{"id":39,"date":"2026-09-21T07:04:32","date_gmt":"2026-09-21T07:04:32","guid":{"rendered":"https:\/\/corpusgame.com\/?p=39"},"modified":"2026-09-21T07:05:32","modified_gmt":"2026-09-21T07:05:32","slug":"cpp-lock","status":"publish","type":"post","link":"https:\/\/corpusgame.com\/en\/cpp-lock\/","title":{"rendered":"[C++] Lock, Mutex, condition variable"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Race Condition<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc11c\ub85c \ub2e4\ub978 Thread\uc5d0\uc11c \uac19\uc740 \uba54\ubaa8\ub9ac\ub97c \uacf5\uc720\ud560 \ub54c \uac19\uc740 \uc790\uc6d0\uc744 \uc0ac\uc6a9\ud558\uba74\uc11c \uac12\uc774 \uc774\uc0c1\ud558\uac8c \ub418\ub294 \uac83\uc744 race condition\uc774\ub77c\uace0 \ud55c\ub2e4.<br>\uc2dc\uc791\ud558\uae30\uc5d0 \uc55e\uc11c \ubaa8\ub4e0 STL\ub4e4\uc740 \uae30\ubcf8\uc801\uc73c\ub85c \uba40\ud2f0\uc2a4\ub808\ub4dc \ud658\uacbd\uc744 \uc81c\uacf5\ud558\uc9c0 \uc54a\ub294\ub2e4\uace0 \uc54c\uc544\uc57c \ud55c\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>void worker(int&amp; counter) {\n  for (int i = 0; i &lt; 10000; i++) {\n    counter += 1;\n  }\n}\n\nint main() {\n  int counter = 0;\n\n  vector&lt;thread&gt; workers;\n  for (int i = 0; i &lt; 4; i++) {\n    \/\/ \ub808\ud37c\ub7f0\uc2a4\ub85c \uc804\ub2ec\ud558\ub824\uba74 ref \ud568\uc218\ub85c \uac10\uc2f8\uc57c \ud55c\ub2e4.\n    workers.push_back(thread(worker, ref(counter)));\n  }\n\n  for (int i = 0; i &lt; 4; i++) {\n    workers&#091;i].join();\n  }\n\n  cout &lt;&lt; \"Counter \ucd5c\uc885 \uac12 : \" &lt;&lt; counter &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uac19\uc740 \uc790\uc6d0\uc744 \uacf5\uc720\ud55c\ub2e4\uace0 \ud574\uc11c \uc5ec\uae30\uc11c\ub294 \ub354\ud558\uae30\ub9cc \ud558\ub2c8\uae4c \uc5b4\ucc28\ud53c \uc2a4\ub808\ub4dc1\uc5d0\uc11c \ub354\ud558\ub098 \uc2a4\ub808\ub4dc2\uc5d0\uc11c \ub354\ud558\ub098 \uc21c\uc11c\uac00 \uc911\uc694\ud558\uc9c0 \uc54a\ub2e4. \ub530\ub77c\uc11c \uacb0\uacfc\ub97c \ud655\uc778\ud574\ubcf4\uba74 40000\uc774 \ub098\uc62c\uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ub77c\uace0 \uc0dd\uac01\ud560 \uc218 \uc788\ub294\ub370 \uc2e4\uc81c\ub85c \ud638\ucd9c\ud574\ubcf4\uba74 \uc774\uc0c1\ud55c \uac12\uc774 \ub098\uc628\ub2e4.<\/li>\n\n\n\n<li>\uc5ec\uae30\uc11c \uc911\uc694\ud55c \uc810\uc740 Race Condition\uc740 \uac19\uc740 \ubcc0\uc218\ub97c \ub2e4\ub978 \uac12\uc73c\ub85c \ubc14\uafc0\ub54c \uc0dd\uae30\ub294 \uac83 \ubfd0\ub9cc \uc544\ub2c8\ub77c \ub2e8\uc21c\ud788 \uac12\uc744 \uc62c\ub9ac\ub294 \uc791\uc5c5\uc744 \ud560\ub54c\ub3c4 \ubc1c\uc0dd\ud55c\ub2e4\ub294 \uc810\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc544\ub2c8 \uc2a4\ub808\ub4dc1\uc5d0\uc11c 3\uc744 \ub300\uc785\ud558\ub824\uace0 \ud558\uace0 \uc2a4\ub808\ub4dc2\uc5d0\uc11c 5\ub97c \ub300\uc785\ud558\ub824\uace0 \ud558\ub294 \uc0c1\ud669\uc774 \uc544\ub2c8\uace0 \uadf8\ub0e5 \uc11c\ub85c \ub354\ud558\uae30\ub9cc \ud558\ub294\ub370\ub3c4 \uc624\ub958\uac00 \uc0dd\uae34\ub2e4\uace0? \uc774\uac74 \ubb54\uac00 \uc798\ubabb\ub410\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774\uac70\ub97c \uc774\ud574\ud558\uae30 \uc704\ud574\uc11c\ub294 <code>counter+=1<\/code>\uc774 \uc2e4\uc81c\ub85c \uc5b4\ub5bb\uac8c \uc218\ud589\ub418\ub294\uc9c0\ub97c \uc54c\uc544\uc57c \ud55c\ub2e4.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mov rax, qword ptr &#91;rbp - 8]\nmov ecx, dword ptr &#91;rax]\nadd ecx, 1\nmov dword ptr &#91;rax], ecx<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Assambly\ucf54\ub4dc\ub85c \ubcf4\uba74 \uc774\ud574\uac00 \uc27d\ub2e4.<\/li>\n\n\n\n<li><code>rax<\/code>, <code>rbp<\/code>\ub294 \ub458\ub2e4 CPU \ub808\uc9c0\uc2a4\ud130\ub97c \uc758\ubbf8\ud55c\ub2e4.<\/li>\n\n\n\n<li><code>qword<\/code>\ub294 8\ubc14\uc774\ud2b8\ub97c \uc758\ubbf8\ud55c\ub2e4. -> \uc8fc\uc18c\uac12\uc758 \ud06c\uae30\ub97c \uc758\ubbf8.<\/li>\n\n\n\n<li><code>dword<\/code>\ub294 4\ubc14\uc774\ud2b8\ub97c \uc758\ubbf8\ud55c\ub2e4. -> int\uac12\uc758 \ud06c\uae30 \ub4f1\ub4f1<\/li>\n\n\n\n<li><code>[]<\/code>\uc758 \uc758\ubbf8\ub294 \uc5ed\ucc38\uc870\ub2e4. \uc989, <code>rbp - 8<\/code>\uc774\ub77c\ub294 \uc8fc\uc18c\uc5d0 \uc788\ub294 \uac12\uc744 \uc77d\uc5b4\ub77c \ub77c\ub294 \ub73b\uc774\uace0 c++\uc758 <code>*<\/code>\uc640 \uac19\uc740 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li><code>mov<\/code>\ub294 \uc774 \ubb38\uc7a5\uc774 \uc5b4\ub5a4 \uba85\ub839\uc744 \ud558\ub294\uc9c0\ub97c \uc758\ubbf8\ud558\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>rax = *(int**)(rbp - 8)<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub294 \ub300\ucda9 \uc774\ub7f0 C++\ucf54\ub4dc \ud615\ud0dc\ub85c \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n\n\n\n<li>rbp-8\uc744 counter\uc758 \uc8fc\uc18c\uac12\uc774 \ub4e4\uc5b4\uc788\ub2e4.<\/li>\n\n\n\n<li>rax\uc5d0\ub294 counter\uc758 \ud3ec\uc778\ud130\ub97c \uc800\uc7a5\ud55c\ub2e4.<\/li>\n\n\n\n<li>ecx\ub294 rax\uc758 \uac12\uc744 \uac00\uc838\uc628\ub2e4. (dword\ub2c8\uae4c int\ub97c \uac00\uc838\uc634 ex: 5)<\/li>\n\n\n\n<li>\ud6c4\uc5d0 ecx\uc5d0 1\uc744 add\ud558\uace0 \uadf8\ub2e4\uc74c \ub354\ud574\uc9c4 \uac12\uc744 \uc800\uc7a5\ud558\ub294 \uac1c\ub150\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uadfc\ub370 \uc0ac\uc2e4 \uc774\ub7f0 \uacfc\uc815\uc740 \ud55c\ubc88 \ub2e4\ub8e8\uace0 \uc2f6\uc5b4\uc11c \ud55c\uac70\uace0 \uc5b4\uc148\ube14\ub9ac\ub97c \ubab0\ub77c\ub3c4 \uad1c\ucc2e\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1580\" height=\"726\" src=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4.png\" alt=\"\" class=\"wp-image-42\" style=\"width:600px;height:auto\" srcset=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4.png 1580w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4-300x138.png 300w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4-1024x471.png 1024w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4-768x353.png 768w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4-1536x706.png 1536w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-4-18x8.png 18w\" sizes=\"auto, (max-width: 1580px) 100vw, 1580px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc6b0\ub9ac\uac00 \uc54c\uc544\uc57c \ud558\ub294\uac70\ub294 \ub2e8\uc21c\ud788 1\uc744 \ub354\ud558\ub294 \uacfc\uc815\uc774 \uc0ac\uc2e4\uc740<\/li>\n\n\n\n<li>\uae30\uc874\uac12\uc744 \uc77d\uace0, 1\uc744 \uc62c\ub9ac\uace0, \ub2e4\uc2dc \uc800\uc7a5\ud558\ub294 3\uac00\uc9c0 \uacfc\uc815\uc73c\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub2e4\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ub530\ub77c\uc11c \uc800\uc7a5\ud558\ub294 \uacfc\uc815\uc5d0\uc11c \ub2e4\ub978 \uc2a4\ub808\ub4dc\ub85c \uc778\ud55c \uc0c8\ub85c\uc6b4 \uacb0\uacfc\ub97c \uc77d\uc9c0 \uc54a\uc73c\ubbc0\ub85c race condition\uc774 \ubc1c\uc0dd\ud558\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f \ucc38\uace0\ub85c <code>push_back()<\/code>\uc744 \ud558\ub294 \uacfc\uc815\ub3c4 \uc774\uc640 \ube44\uc2b7\ud558\uac8c \ub4a4\uc5d0 \ucd94\uac00\ud558\ub294 \uac70\uc9c0\ub9cc \uba40\ud2f0 \uc2a4\ub808\ub4dc\uc5d0\uc11c\ub294 \ucda9\ub3cc\uc774 \uc77c\uc5b4\ub098\uac8c \ub41c\ub2e4. \uc774 \uc774\uc720\uc5d0 \ub300\ud574\uc11c \uc0dd\uac01\uc744 \ud574\ubcf4\uc790\uba74 \ub3d9\uc801 \ubc30\uc5f4\uac19\uc740 \uacbd\uc6b0\ub294 \ubc94\uc704\ub97c \ub118\uc5b4\uc11c\uac8c \ub418\uba74 \uadf8 \uacf5\uac04\uc744 \ubcf5\uc0ac\ud558\uace0 \ud574\uc81c\uc2dc\ucf1c \ub2e4\ub978 \uc5ec\uc720 \uacf5\uac04\uc73c\ub85c \uc774\ub3d9\ud558\uac8c \ub420\ud150\ub370, \ub2e4\ub978 \uc2a4\ub808\ub4dc\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc601\uc5ed\uc744 \ud574\uc81c\ud558\ub824\uace0 \uc2dc\ub3c4\ud558\uae30 \ub54c\ubb38\uc5d0 double free\ubb38\uc81c\uac00 \uc0dd\uae30\uac8c \ub420\uac83\uc774\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Atomic<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc774\ub7ec\ud55c race condition\uc744 \uad00\ub9ac\ud558\uae30 \uc704\ud574\uc11c\ub294 \ud2b9\uc815 \ub370\uc774\ud130\uc5d0 \uc811\uadfc\uc744 \ud560\ub54c \ud55c\ubc88\uc5d0 \ud558\ub098\uc758 \uc2a4\ub808\ub4dc\ub9cc \uc811\uadfc\uc744 \ud5c8\ub77d\uc744 \ud574\uc918\uc57c \ud558\ub294\ub370 \uc774\ub7ec\ud55c \ubc29\ubc95\uc73c\ub85c\ub294 Atomic\uc744 \uc774\uc6a9\ud55c \uad00\ub9ac\uac00 \uc788\ub2e4. \uc5b4\ub5bb\uac8c \ubcf4\uba74 \uac00\uc7a5 \uc21c\uc218\ud55c \uc811\uadfc \uc81c\uc57d\uc774\ub77c\uace0 \ubcf4\uba74 \ub41c\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>int SUM = 0;\n\nvoid Add() {\n    for (int i = 0; i &lt; 10000; i++) {\n        SUM++;\n    }\n}\n\nvoid Sub() {\n    for (int i = 0; i &lt; 10000; i++) {\n        SUM--;\n    }\n}\n\nint main() {\n\tAdd();\n    Sub();\n    cout &lt;&lt; \"result:\" &lt;&lt;  SUM &lt;&lt; endl;\n\n    thread t1(Add);\n    thread t2(Sub);\n\n    t1.join();\n    t2.join();\n    cout &lt;&lt; \"thread result:\" &lt;&lt;  SUM &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub807\uac8c \ub3d9\uc791\uc2dc\ud0a4\uac8c \ub418\uba74, \uc704\uc5d0\uc11c \ubc30\uc6b4 race condition\uc73c\ub85c \uc778\ud574 \uc2a4\ub808\ub4dc \ud6c4 \uacb0\uacfc\ub294 0\uc774 \ub098\uc624\uc9c0 \uc54a\uc744 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ucc38\uace0\ub85c \uac01 \uc2a4\ub808\ub4dc\ub294 \uac01 \uc2a4\ud0dd\uc601\uc5ed\uc744 \uac00\uc9c0\uc9c0\ub9cc \uacf5\ud1b5\ub41c \ub370\uc774\ud130\uc601\uc5ed\uacfc \ud799\uc601\uc5ed\uc744 \uac00\uc9c0\uae30 \ub54c\ubb38\uc5d0 \uc804\uc5ed\uc73c\ub85c \ub9cc\ub4e4\uc5b4\uc9c4 SUM\uc744 \uac01 \uc2a4\ub808\ub4dc\uac00 \uac74\ub4dc\ub9ac\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;atomic&gt;\n\natomic&lt;int&gt; SUM {0};\n\nvoid Add() {\n    for (int i = 0; i &lt; 10000; i++) {\n        \/\/SUM++;\n        SUM.fetch_add(1);\n    }\n}\n\nvoid Sub() {\n    for (int i = 0; i &lt; 10000; i++) {\n        \/\/SUM--;\n        SUM.fetch_sub(1);\n    }\n}\n\nint main() {\n\tAdd();\n    Sub();\n    cout &lt;&lt; \"result:\" &lt;&lt;  SUM &lt;&lt; endl;\n\n    thread t1(Add);\n    thread t2(Sub);\n\n    t1.join();\n    t2.join();\n    cout &lt;&lt; \"thread result:\" &lt;&lt;  SUM &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>result:0\nthread result:0<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub807\uac8c \uc790\ub8cc\ud615\uc5d0 atomic\uc744 \uac10\uc2f8\uba74 \uc6d0\uc790\uc801\uc73c\ub863 \ub3d9\uc791\ud558\ub294\uac78 \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub9ac\uace0 SUM++\uc744 \uc0ac\uc6a9\ud574\ub3c4 \ub418\uc9c0\ub9cc SUM.fetch_add(1) \uc774\ub807\uac8c \uc0ac\uc6a9\ud558\ub294 \uac83\ub3c4 \uac00\ub2a5\ud558\ub2e4.<\/li>\n\n\n\n<li>\uc774\ucc98\ub7fc Atomic\uc744 \uc774\uc6a9\ud558\uba74 \uc6d0\uc790\uc801\uc778 \uc811\uadfc\uc73c\ub85c \ud55c\ubc88\uc5d0 \ud558\ub098\ub9cc \uc811\uadfc\ud560 \uc218 \uc788\uac8c \uac15\uc81c\ud574\uc8fc\ub294 \uac1c\ub150\uc774\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f \ucc38\uace0\ub85c STL\uac19\uc740\uac70\ub294 atomic\uc73c\ub85c \uac10\uc300 \uc218 \uc5c6\ub2e4. \uadf8 \uc774\uc720\ub294 STL\uc5d0\ub294 \uc5ec\ub7ec \uae30\ub2a5\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc774 \uc804\uccb4\ub97c atomic\uc73c\ub85c \uac10\uc2f8\ub294\uac74 \ube44\ud6a8\uc728\uc801\uc774\uace0 STL\ub4e4\uc740 \ub0b4\ubd80\uc801\uc73c\ub85c allocator\uac00 \uc788\uace0 \uc0dd\uc131\uc790 \uc18c\uba78\uc790 \ub4f1 \uc6d0\ud558\ub294 \uc2a4\ud0c0\uc77c\uc774 \ub2e4\ub974\uae30 \ub54c\ubb38\uc774\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lock<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc774\ub7f0 race condition\uc744 \uc81c\uc5b4\ud558\ub294 \uac83 \uc911 \uac00\uc7a5 \ub300\ud45c\uc801\uc778\uac83\uc774 \ubc14\ub85c Lock\uc774\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>vector&lt;int&gt; v;\n\nvoid Push() {\n    for (int i = 0; i &lt; 100000; ++i) {\n        v.push_back(i);\n    }\n}\n\nint main() {\n    thread t1(Push);\n    thread t2(Push);\n\n    t1.join();\n    t2.join();\n\n    cout &lt;&lt; \"Vector size: \" &lt;&lt; v.size() &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc790 \uadf8\ub7fc \uc774\ub7ec\ud55c \ucf54\ub4dc\ub97c \uc2e4\ud589\ud558\uba74 vector\uc5d0 20\ub9cc\uac1c\uc758 \ub370\uc774\ud130\uac00 \uc0dd\uae30\uac8c \ub41c\ub2e4.<\/li>\n\n\n\n<li>\ud558\uc9c0\ub9cc \ub9c9\uc0c1 \uc2e4\ud589\ud574\ubcf4\uba74 \uae30\ub300\uc640\ub294 \ub2ec\ub9ac \ubc14\ub85c \ud06c\ub7ec\uc2dc\uac00 \ub098\uac8c \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uc77c\ub2e8 \uc9da\uace0 \ub118\uc5b4\uac00\uc57c \ud558\ub294\uac8c \uae30\uc874 STL\ub4e4\uc740 \ubaa8\ub450 \uba40\ud2f0 \uc2a4\ub808\ub529 \ud658\uacbd\uc5d0\uc11c \uc624\ub958\uac00 \ub09c\ub2e4\uace0 \uc0dd\uac01\ud574\uc57c \ud55c\ub2e4.<\/li>\n\n\n\n<li>\uc554\ud2bc \ubb38\uc81c\ub294 \uc704\uc640 \ub3d9\uc77c\ud558\ub2e4. \ubc94\uc704\ub97c \ucd08\uacfc\ud558\uac8c \ub418\uba74 \uc6d0\ub798\ub77c\uba74 \ub2e4\ub978 \uba54\ubaa8\ub9ac \uacf5\uac04\uc5d0 \uc774\ub97c \ubcf5\uc0ac\ud558\uace0 \ud06c\uae30\ub97c \ub298\ub9b0\ub2e4\uc74c\uc5d0 \uadf8 \ub4a4\uc5d0 \ub123\uac8c \ub41c\ub2e4. \ud6c4\uc5d0 \uc6d0\ub798 \uba54\ubaa8\ub9ac \uacf5\uac04\uc744 \ube44\uc6cc\uc8fc\uac8c \ub420\ud150\ub370. \uc774 \uacfc\uc815\uc5d0\uc11c \uba40\ud2f0 \uc2a4\ud14c\ub4dc\ub85c \ud574\ubc84\ub9b0\ub2e4\uba74 \uc11c\ub85c \ub123\uc73c\ub824\uace0 \ud558\uac70\ub098 \ub2e4\ub978 \uc2a4\ub808\ub4dc\uc5d0 \uc758\ud574 \uc774\ubbf8 \ube44\uc6cc\uc84c\ub294\ub370 \ub123\uc73c\ub824\uace0 \uc2dc\ub3c4\ud55c\ub2e4\uba74? \ub2f9\uc5f0\ud788 \ubb38\uc81c\uac00 \uc0dd\uae38 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub807\uac8c \uc11c\ub85c \ube44\uc6b0\ub824\uace0 \ud558\ub294\uac78 \ub354\ube14\ud504\ub9ac \ubb38\uc81c\ub77c\uace0 \ubd80\ub978\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>v.reserve(200000)<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uadf8\ub7ec\uba74 \uc774\ub807\uac8c \ubbf8\ub9ac 20\ub9cc\uac1c\uc758 \uacf5\uac04\uc744 \ub9cc\ub4e4\uc5b4 \ub450\uace0 \uc774\uac78 \uc2e4\ud589\ud558\uba74 \ubb38\uc81c\uac00 \uc5c6\uc9c0 \uc54a\uc744\uae4c?<\/li>\n\n\n\n<li>\uc774\uac83\ub3c4 \ub2f9\uc5f0\ud558\uac8c \uba87\uac1c\uc758 vector\uc740 \uc18c\uc2e4 \ub420 \uac83\uc774\ub2e4. \uc65c\ub0d0\uba74 \uac19\uc740 \uc778\ub371\uc2a4\uc5d0 \uc11c\ub85c \uc0dd\uc131\ud558\ub824\uace0 \uc911\ubcf5\uc774 \ub418\ub294 \uacbd\uc6b0\uac00 \uc788\uc744 \uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \uc774\ub294 + \uc5f0\uc0b0\ucc98\ub7fc \ubc14\ub85c \uc218\ud589\uc774 \ub418\uc9c0\uc54a\uace0 \uc2e4\uc81c\ub85c\ub294 \uc5ec\ub7ec \uc2a4\ud15d\uc73c\ub85c \ub098\ub204\uc5b4\uc11c \ub3d9\uc791\ub418\uae30 \ub54c\ubb38\uc5d0 \uc77c\uc5b4\ub098\ub294 \uc77c\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub97c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc740 \ub77d\uc744 \uac78\uc5b4\uc11c \uc784\uacc4\uad6c\uc5ed\uc744 \uc81c\ud55c\ud558\ub294 \uac83\uc778\ub370, <code>mutex<\/code>\ub97c \uc0ac\uc6a9\ud558\uba74 \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Mutex<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\ud55c\ubc88\uc5d0 \ud558\ub098\uc758 \uc2a4\ub808\ub4dc\ub9cc \uc790\uc6d0\uc5d0 \uc811\uadfc\ud560 \uc218 \uc788\uac8c \ud574\uc8fc\ub294 \uc7a0\uae08 \uc7a5\uce58 \uac1d\uccb4.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>OS\ubd80\ubd84\uc5d0\uc11c \ud55c\ubc88 \ub2e4\ub918\ub294\ub370 \uc138\ub9c8\ud3ec\uc5b4\ub294 \ud2b9\uc815 N\uac1c\ub97c \ud5c8\ub77d\ud558\uae30 \ub54c\ubb38\uc5d0 int\ub85c \uc7a0\uae08\uc744 \ud655\uc778\ud558\ub294 \ub290\ub08c\uc774\uace0 Mutex\ub294 \ud55c\uac1c\uc758 \uac1d\uccb4\ub9cc \ud5c8\ub77d\ud558\uae30 \ub54c\ubb38\uc5d0 bool\ud0c0\uc785\uc73c\ub85c \uc7a0\uae08\uc744 \ud655\uc778\ud558\ub294 \uac70\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uacb0\ub860: \uc9f1\uc9f1 \uc88b\uc740 lock = Mutex<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;mutex&gt;  \/\/ mutex \ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \ud544\uc694\n\nvoid worker(int&amp; result, mutex&amp; m) {\n  for (int i = 0; i &lt; 10000; i++) {\n    m.lock();\n    result += 1;\n    m.unlock();\n  }\n}\n\nint main() {\n  int counter = 0;\n  mutex m;  \/\/ \uc6b0\ub9ac\uc758 mutex \uac1d\uccb4\n\n  vector&lt;thread&gt; workers;\n  for (int i = 0; i &lt; 4; i++) {\n    workers.push_back(thread(worker, ref(counter), ref(m)));\n  }\n\n  for (int i = 0; i &lt; 4; i++) {\n    workers&#091;i].join();\n  }\n\n  cout &lt;&lt; \"Counter \ucd5c\uc885 \uac12 : \" &lt;&lt; counter &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc544\uae4c \uc704\uc640 \uac19\uc740 \ucf54\ub4dc\ub294 \uadf8\ub0e5 mutex\uac1d\uccb4\ub97c \ubc1b\uc544\uc11c lock()\uacfc unlock()\uc744 \uc218\ud589\ud558\uba74 \uc2a4\ubb34\uc2a4 \ud558\uac8c \ub3d9\uc791 \uc2dc\ud0ac \uc218 \uc788\ub2e4.<\/li>\n\n\n\n<li>\ub2f9\uc5f0\ud558\uc9c0\ub9cc unlock()\uc744 \ube7c\uba39\uc73c\uba74 \ub2e4\ub978 \uc560\ub4e4\uc740 \ud3c9\uc0dd \uae30\ub2e4\ub824\uc57c \ud55c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>m.lock();\nm.lock();\n\/\/ TODO \ubb54\uac00 \ucc98\ub9ac\nfunction();\nm.unlock();\nm.unlock();<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ucc38\uace0\ub85c mutex\ub294 \uc774\ub7f0\uc2dd\uc73c\ub85c \uc7ac\uadc0\uc801\uc73c\ub85c \ub77d\uc744 \uac78 \uc218 \uc5c6\ub2e4. (CRASH \ubc1c\uc0dd)<\/li>\n\n\n\n<li>\uac8c\ub2e4\uac00 \ud56d\uc0c1 lock\uc744 \ud588\uc73c\uba74 unlock\uc73c\ub85c \ud480\uc5b4\uc918\uc57c \ud558\ub294\ub370 \uc911\uac04\uc5d0 \uc870\uac74\ubb38\uc5d0 \uc758\ud574 break\ub97c \ub123\uac70\ub098 \ud558\ub294 \uc2dd\uc774\uba74 \uc0c1\ub2f9\ud788 \uadc0\ucc2e\uc544\uc9c8 \uac83\uc774\ub2e4. \ub530\ub77c\uc11c \uc774\ub97c \ud574\uacb0\ud560 \uc218 \uc788\ub294\uac8c \ubc14\ub85c <code>lock_guard<\/code>\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">lock_guard<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>void worker(int&amp; result, mutex&amp; m) {\n  for (int i = 0; i &lt; 10000; i++) {\n    \/\/ lock \uc0dd\uc131 \uc2dc\uc5d0 m.lock() \uc744 \uc2e4\ud589\ud55c\ub2e4\uace0 \ubcf4\uba74 \ub41c\ub2e4.\n    lock_guard&lt;std::mutex&gt; lock(m);\n    result += 1;\n\n    \/\/ scope \ub97c \ube60\uc838 \ub098\uac00\uba74 lock \uc774 \uc18c\uba78\ub418\uba74\uc11c\n    \/\/ m \uc744 \uc54c\uc544\uc11c unlock \ud55c\ub2e4.\n  }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud56d\uc0c1 unlock()\ud558\uae30\uc5d0 \uc2e4\uc218\ub3c4 \ud558\uae30\ub54c\ubb38\uc5d0 c++\uc5d0\uc11c\ub294 lock_gurad\ub97c \uc81c\uacf5\ud55c\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub294 \ucf54\ub4dc\ube14\ub85d(scope)\ub97c \ube60\uc838\ub098\uac00\uba74 \uc54c\uc544\uc11c unlock\uc744 \uc218\ud589\ud558\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>Mutex\ub97c \uadf8\ub0e5 lock, unlock\uc744 \ud558\ub294 \uacbd\uc6b0\ub294 \ub514\ud14c\uc77c\ud558\uac8c \uc131\ub2a5\uc744 \uc62c\ub9ac\uace0 \uc2f6\uc744 \ub54c \uc0ac\uc6a9\ud558\uc9c0\ub9cc \ub300\ubd80\ubd84\uc758 \uc0c1\ud669\uc5d0\uc11c\ub294 lock_guard\ub97c \uc0ac\uc6a9\ud558\ub294\uac8c \uc815\uc2e0\uac74\uac15\uc5d0 \uc774\ub86d\ub2e4.<\/li>\n\n\n\n<li>lock_guard\ub294 <code>RAII<\/code>\ub77c\ub294 \uc6d0\uce59\uc5d0 \ub530\ub77c \ub3d9\uc791\ud558\ub294\uac74\ub370 \uc27d\uac8c \ub9d0\ud558\uc790\uba74 \uc0dd\uc131\uc790\uc5d0\uc11c \ub77d\uc744 \uac78\uace0 \uc18c\uba78\uc790\uc5d0\uc11c \ub77d\uc744 \ud478\ub294 \ud328\ud134\uc73c\ub85c \ub9cc\ub4e4\uc5b4 \uc84c\ub2e4\uace0 \ubcf4\uba74 \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uc9c1\uc811 \ub9cc\ub4e4\uc5b4 \ubcf4\uc790\uba74 \uc774\ub7f0\uc2dd\uc73c\ub85c \ub9cc\ub4e4 \uc218 \uc788\uc744 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>template&lt;typename T&gt; \nclass LockGuard {\npublic:\n    LockGuard(T&amp; m) {\n        _mtx = &amp;m;\n        _mtx-&gt;lock();\n    }\n    ~LockGuard() {\n        _mtx-&gt;unlock();\n    }\nprivate:\n    T* _mtx;\n};\n\nvector&lt;int&gt; v;\nmutex m;\n\nvoid Push() {\n    for (int i = 0; i &lt; 100000; ++i) {\n        LockGuard&lt;mutex&gt; lg(m);\n        v.push_back(i);\n    }\n}\n\nint main() {\n    thread t1(Push);\n    thread t2(Push);\n\n    t1.join();\n    t2.join();\n\n    cout &lt;&lt; \"Vector size: \" &lt;&lt; v.size() &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub807\uac8c \ub77d\uc744 \ubc1b\uc544\uc11c \uc0dd\uc131\uc790\uc5d0\uc11c \ub77d\uc744 \uac78\uace0 \uc18c\uba78\uc790\uc5d0\uc11c \ub77d\uc744 \ud480\uae30 \ub54c\ubb38\uc5d0 \uc120\uc5b8\ub41c \uc2a4\ucf54\ud504 \ub0b4\uc5d0\uc11c \ub77d\uc744 \uc720\uc9c0\ud558\uac8c \ub420 \uac83\uc774\uace0 \ub9cc\uc57d\uc5d0 \uc2a4\ucf54\ud504\ub97c \ubc97\uc5b4\ub098\uac8c \ub418\uba74 \uc54c\uc544\uc11c \uc2a4\ud0dd\uc744 \uc815\ub9ac\ud558\uba74\uc11c \uc18c\uba78\uc790\uac00 \ud638\ucd9c\ub418\uba74\uc11c \ub77d\uc744 \ud574\uc81c\ud560 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub7f0 lock_guard\ub294 \uae30\ubcf8\uc801\uc73c\ub85c \uc81c\uacf5\ub418\uae30 \ub54c\ubb38\uc5d0 \uac00\uc838\ub2e4\uac00 \uc0ac\uc6a9\ud558\uba74 \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void worker1(std::mutex&amp; m1, std::mutex&amp; m2) {\n  for (int i = 0; i &lt; 10000; i++) {\n    std::lock_guard&lt;std::mutex&gt; lock1(m1);\n    std::lock_guard&lt;std::mutex&gt; lock2(m2);\n    \/\/ Do something\n  }\n}\n\nvoid worker2(std::mutex&amp; m1, std::mutex&amp; m2) {\n  for (int i = 0; i &lt; 10000; i++) {\n    std::lock_guard&lt;std::mutex&gt; lock2(m2);\n    std::lock_guard&lt;std::mutex&gt; lock1(m1);\n    \/\/ Do something\n  }\n}\n\nint main() {\n  int counter = 0;\n  std::mutex m1, m2;  \/\/ \uc6b0\ub9ac\uc758 mutex \uac1d\uccb4\n\n  std::thread t1(worker1, std::ref(m1), std::ref(m2));\n  std::thread t2(worker2, std::ref(m1), std::ref(m2));\n\n  t1.join();\n  t2.join();\n\n  std::cout &lt;&lt; \"\ub05d!\" &lt;&lt; std::endl;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uadfc\ub370 <code>lock_guard<\/code>\ub97c \uc0ac\uc6a9\ud55c\ub2e4\uace0 \ud574\uc11c \ub370\ub4dc\ub77d\uc774 \ud68c\ud53c\ub418\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\uc11c\ub85c\uac00 \uc11c\ub85c\uc758 lock\uc744 \uae30\ub2e4\ub9ac\uba74 \ub2f9\uc5f0\ud788 \ub370\ub4dc\ub77d\uc774 \ubc1c\uc0dd\ud55c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void worker2(std::mutex&amp; m1, std::mutex&amp; m2) {\n  for (int i = 0; i &lt; 10000; i++) {\n    while (true) {\n      m2.lock();\n\n      \/\/ m1 \uc774 \uc774\ubbf8 lock \ub418\uc5b4 \uc788\ub2e4\uba74 m2\uc5d0 \uad00\ud55c \ub77d\uc744 \ud47c\ub2e4.\n      if (!m1.try_lock()) {\n        m2.unlock();\n        continue;\n      }\n\n      std::cout &lt;&lt; \"Worker2 Hi! \" &lt;&lt; i &lt;&lt; std::endl;\n      m1.unlock();\n      m2.unlock();\n      break;\n    }\n  }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub294 worker2 \ubd80\ubd84\uc5d0\uc11c m1\uc774 \ub77d\uc774 \uac78\ub824\uc788\uc9c0 \uc54a\uc744\ub54c\ub9cc \ub77d\uc744 \uac78\uace0 \ud560\uc77c\uc744 \ud558\uba74 \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uc774\ubbf8 \ub77d\uc774 \uac78\ub824\uc788\uc73c\uba74 \ube44\ucf1c\uc8fc\ub294 \uac1c\ub150\uc73c\ub85c \uc811\uadfc\ud558\uba74 \ub370\ub4dc\ub77d\uc740 \ud53c\ud560 \uc218 \uc788\uc744 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">unique_lock<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">lock_guard \ub9d0\uace0\ub3c4 unique_lock\uc774\ub77c\ub294 wrapper\ub3c4 \uc874\uc7ac\ud55c\ub2e4. \ud070 \ucc28\uc774\uc810\uc774\ub77c\uace0 \ud55c\ub2e4\uba74 \uc720\uc5f0\uc131\uc5d0 \uc788\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>mutex m;\nvoid Flexible() {\n    unique_lock&lt;mutex&gt; lock(m, defer_lock);  \/\/ lock \uc548 \ud568\n    if (need_lock) lock.lock();              \/\/ \uc870\uac74 lock\n    \n    \/\/ \uc791\uc5c51\n    lock.unlock();                           \/\/ \uc784\uc2dc unlock\n    DoIO();                                  \/\/ IO \uc911 mutex \ud480\uae30\n    \n    lock.lock();                             \/\/ \uc7aclock\n    \/\/ \uc791\uc5c52\n}  \/\/ \uc790\ub3d9 unlock<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>unique_lock\uac19\uc740 \uacbd\uc6b0\ub294 \uae30\ubcf8\uc740 lock_guared\ucc98\ub7fc \ud638\ucd9c\uc774 \ub418\uba74 \ub77d\uc774 \uac78\ub9ac\uc9c0\ub9cc unique_lock(defer_lock) \uc774\ub7f0\uc2dd\uc73c\ub85c \ubaa8\ub4dc\ub97c \ubc14\uafb8\uba74 \ud638\ucd9c\uc774 \ub420\ub54c \ubc14\ub85c \uc7a0\uae30\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \ub530\ub85c lock\uc744 \ud638\ucd9c\ud574\uc57c \uadf8\uc81c\uc11c\uc57c \ub77d\uc774 \uac78\ub9ac\uac8c \ud560 \uc218 \uc788\ub2e4. (\uc720\uc5f0\ud55c \ucc98\ub9ac \uac00\ub2a5)<\/li>\n\n\n\n<li>\ub300\ubd80\ubd84\uc758 \uacbd\uc6b0\ub294 lock_guard\ub97c \uc0ac\uc6a9\ud558\uae30 \ub54c\ubb38\uc5d0 \uc77c\ub2e8 \uc774\ub807\uac8c\ub9cc \uc54c\uace0 \ub118\uc5b4\uac00\uaca0\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Lock \uad6c\ud604<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc774\ub7f0 \ub77d\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc5d0\ub294 \ud06c\uac8c 3\uac00\uc9c0\uac00 \uc874\uc7ac\ud558\uac8c \ub41c\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spin Lock<\/li>\n\n\n\n<li>Sleep \ubc29\uc2dd<\/li>\n\n\n\n<li>Event \ubc29\uc2dd<\/li>\n\n\n\n<li>Spin\ubc29\uc2dd\uc740 \uc27d\uac8c \ub9d0\ud574\uc11c \ubc18\ubcf5\ubb38\uc73c\ub85c \uacc4\uc18d \ub77d\uc744 \uc5bb\uae30 \uc704\ud574 \uc2dc\ub3c4\ud558\uace0 \uc788\ub294 \uac1c\ub150\uc774\ub2e4.<\/li>\n\n\n\n<li>Sleep \ubc29\uc2dd\uc740 \ub77d \ud68d\ub4dd\uc5d0 \uc2e4\ud328\ud558\uba74 sleep \uc0c1\ud0dc\uac00 \ub418\ub294\uac70\uace0, sleep\uc2dc\uac04\uc744 \uc815\ud574 \uc911\uac04\uc911\uac04 \ud655\uc778\ud558\ub294 \ubc29\uc2dd\uc774\ub2e4. \uc774 \ubc29\uc2dd\uc740 spin\uacfc \ub9c8\ucc2c\uac00\uc9c0\ub85c \ubc18\ubcf5\uc801\uc73c\ub85c \ub3d9\uc791\uc744 \ud55c\ub2e4. \ub9cc\uc57d sleep\uc2dc\uac04\uc744 \ubb34\ud55c\uc73c\ub85c \ud558\uac8c \ub418\uba74 OS\uac00 \uc784\uc758\ub85c \uc911\uac04\uc911\uac04 \uae68\uc6b0\uba74\uc11c \ud655\uc778\ud558\uac8c \ub41c\ub2e4.<\/li>\n\n\n\n<li>Event \ubc29\uc2dd\uc740 OS\uc5d0\uac8c \uc608\uc57d\uc744 \uac78\uc5b4\ub450\uace0, \uc120\uc810\ud558\ub358 \uc2a4\ub808\ub4dc\uac00 \ub05d\ub098\uba74 OS\uc5d0 \ub05d\ub0ac\ub2e4\uace0 \uc54c\ub824\uc918\uc11c \uadf8 \ud6c4\uc5d0 OS\uac00 \uc608\uc57d\uc744 \uac78\uc5b4\ub454 \uc2a4\ub808\ub4dc\uc5d0\uac8c \uc54c\ub824\uc8fc\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Spin Lock (with CAS)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>class SpinLock {\npublic:\n    void lock() {\n        while (_lock) {\n            \n        }\n        _lock = true;\n    }\n\n    void unlock() {\n        _lock = false;\n    }\nprivate:\n    bool _lock = false;\n};\n\nint SUM = 0;\nSpinLock spinlock;\nvoid Add() {\n    for (int i = 0; i &lt; 10000; i++) {\n        spinlock.lock();\n        SUM++;\n        spinlock.unlock();\n    }\n}\n\nvoid Sub() {\n    for (int i = 0; i &lt; 10000; i++) {\n        spinlock.lock();\n        SUM--;\n        spinlock.unlock();\n    }\n}\n\nint main() {\n    thread t1(Add);\n    thread t2(Sub);\n\n    t1.join();\n    t2.join();\n\n    cout &lt;&lt; \"result:\" &lt;&lt;  SUM &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>spin lock\uc744 \uad6c\ud604\ud55c\ub2e4\uba74 \uc544\ub9c8 \uc774\ub7f0 \ud615\ud0dc\ub85c \uad6c\ud604\ud558\uac8c \ub420 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uba64\ubc84\ubcc0\uc218\ub85c bool \ud0c0\uc785\uc744 \uac00\uc9c0\uace0, \uc774\uac78 \ud1a0\ub300\ub85c true, false\ub97c \ud558\uba74\uc11c \ubb34\ud55c \ub300\uae30\ub97c \ud558\uac8c \ub420 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ud558\uc9c0\ub9cc \uc774 \ucf54\ub4dc\ub97c \uc2e4\ud589\ud558\uba74 \uc6b0\ub9ac \uae30\ub300\uc640 \ub2ec\ub9ac \uc5c9\ub6b1\ud55c \uac12\uc774 \ub098\uc624\uac8c \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uadf8 \uc774\uc720\ub294 while(){}\uc744 \ub3d9\uc2dc\uc5d0 \uc5ec\ub7ec \uc4f0\ub808\ub4dc\uac00 \ube60\uc838\ub098\uac00\uc11c \uc11c\ub85c _lock\uc744 true\ub85c \ubc14\uafb8\uba70 \ubcf8\uc778\uc774 \uc2b9\ub9ac\uc790\ub77c\uace0 \ucc29\uac01\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub7ec\uba74 \uc774\uac78 \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c\ub294 atomic\uc744 \uc0ac\uc6a9\ud558\uba74 \ub420 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>class SpinLock {\npublic:\n    void lock() {\n        bool expected = false;\n        bool desired = true;\n\n        while (_lock.compare_exchange_strong(expected, desired) == false) {\n            expected = false;\n        }\n    }\n\n    void unlock() {\n        _lock.store(false);\n    }\nprivate:\n    atomic&lt;bool&gt; _lock{ false };\n};<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\uac78 \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c\ub294 CAS(Compare-And-Swap)\uacc4\uc5f4\uc758 \ud568\uc218\ub97c \uc0ac\uc6a9\ud574\uc57c \ud55c\ub2e4.<\/li>\n\n\n\n<li>CAS\ub294 \ub77d\ud504\ub9ac\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud558\uac8c \uc0ac\uc6a9\ub418\ub294\ub370 \uc27d\uac8c \ub9d0\ud574\uc11c &#8220;\ube44\uad50\ud574\uc11c \uac19\uc73c\uba74 \uac12\uc744 \ubc14\uafbc\ub2e4.&#8221;\ub77c\ub294 \ub3d9\uc791 \uc6d0\ub9ac\ub97c \uac00\uc9c0\uace0 \uc788\ub2e4.<\/li>\n\n\n\n<li><code>compare_exchange_strong<\/code>\uc774\ub77c\ub294 \uac83\uc774 \ub300\ud45c\uc801\uc778 CAS \ud568\uc218\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc5ec\uae30\uc11c \uc54c\uc544\uc57c \ud558\ub294 \uc810\uc740 \uccab\ubc88\uc9f8 expected\uc778\uc790\uc758 \ub808\ud37c\ub7f0\uc2a4\ub97c \ubc1b\uae30 \ub54c\ubb38\uc5d0 \uac12\uc774 \ubc14\ub010\ub2e4\ub294 \uc810\uc774\ub2e4. \uadf8\ub7ec\uba74 \uc5b4\ub5bb\uac8c \ubc14\ub014\uc9c0\uac00 \ub9e4\uc6b0 \uc911\uc694\ud558\uac8c \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>if (_lock == expected)\n{\n\texpected = _lock;\n\t_lock = desired;\n    return true;\n}\nelse\n{\n\texpected = _lock;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc77c\ub2e8 CAS\uc758 \uc758\uc0ac\ucf54\ub4dc\ub97c \ud55c\ubc88 \uba3c\uc800 \uc0b4\ud3b4\ubcf4\uc790.<\/li>\n\n\n\n<li><code>_lock<\/code>\uc774 \uc6b0\ub9ac\uac00 \uae30\ub300\ud558\ub294 <code>expacted<\/code>\uac12\uacfc \uac19\ub2e4\uba74 <code>desired<\/code>\uac12\uc73c\ub85c \ubc14\uafb8\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc5ec\uae30\uc11c \uc911\uc694\ud55c\uac70\ub294 \uacb0\uacfc\uac00 \uc5b4\ub5bb\uac8c \ub098\uc624\ub4e0 <code>expacted<\/code>\uac00 <code>_lock<\/code>\uc758 \uac12\uc73c\ub85c \ubcc0\ud658\uc774 \ub41c\ub2e4\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub798\uc11c \ubc18\ubcf5\ubb38\uc5d0\uc11c\ub294 \ub2e4\uc2dc <code>expacted<\/code>\uac12\uc744 false\ub85c \ucd08\uae30\ud654 \ud574\uc8fc\uace0 \uc788\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub9ac\uace0 \ubc18\ubcf5\ubb38\uc744 \ub3cc\ub2e4\uac00 <code>_lock<\/code>\uc774 false\uac00 \ub418\uba74 \uc774\uac78 true(desired)\ub85c \ubc14\uafd4\uc8fc\uace0 \ubc18\ubcf5\ubb38\uc744 \ube60\uc838\ub098\uac00\uac8c \ub418\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774 \ubaa8\ub4e0 \uacfc\uc815\uc740 atomic\ud558\uac8c \uc774\ub8e8\uc5b4\uc9c0\uac8c \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Sleep<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc0ac\uc2e4 Sleep\uc5d0 \ub300\ud574\uc11c \uc880 \uc54c\uae30 \uc704\ud574\uc11c\ub294 \uc2a4\ucf00\uc904\ub9c1\uc5d0 \ub300\ud574\uc11c \uc54c\uba74 \uc88b\ub2e4.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1399\" src=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-scaled.png\" alt=\"\" class=\"wp-image-41\" style=\"width:600px;height:auto\" srcset=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-scaled.png 2560w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-300x164.png 300w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-1024x560.png 1024w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-768x420.png 768w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-1536x839.png 1536w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-2048x1119.png 2048w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-3-18x10.png 18w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub807\uac8c Ready\uc0c1\ud0dc\uc774\ub2e4\uac00 \uc2e4\ud589\uc911\uc774 \ub418\ub294\ub370, \uc5ec\uae30\uc11c \uc790\ubc1c\uc801\uc73c\ub85c system call\uc744 \ud1b5\ud574 wait\uc0c1\ud0dc\ub85c \uc804\ud658\uc774 \ub418\uace0, \uc774\uac8c \ub05d\ub098\uba74 \ub2e4\uc2dc Ready\ud050\uc5d0 \ub4e4\uc5b4\uac00\uba74\uc11c \ub2e4\uc74c \ucc28\ub840\ub97c \uae30\ub2e4\ub9ac\uac8c \ub418\ub294 \uac1c\ub150\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc5ec\uae30\uc11c system call\uc774\ub780 \ub0b4 \ud504\ub85c\uadf8\ub7a8\uc774 \ucee4\ub110\uc5d0 \uba85\ub839\ud558\uac8c \ub418\ub294 \uadf8\ub7f0 \uac83\ub4e4\uc744 \ub9d0\ud558\ub294 \uac70\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>class SpinLock {\npublic:\n    void lock() {\n        bool expected = false;\n        bool desired = true;\n\n        while (_lock.compare_exchange_strong(expected, desired) == false) {\n            expected = false;\n\n            this_thread::sleep_for(100ms);\n        }\n    }\n\n    void unlock() {\n        _lock.store(false);\n    }\nprivate:\n    atomic&lt;bool&gt; _lock{ false };\n};<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc0ac\uc6a9\uc740 \ub9e4\uc6b0 \uac04\ub2e8\ud558\uac8c \uadf8\ub0e5 <code>sleep_for()<\/code>\ub97c \uc774\uc6a9\ud558\uba74 \uc54c\uc544\uc11c \uc6d0\ud558\ub294 \uc2dc\uac04\ub9cc\ud07c \ub300\uae30\ud558\ub2e4\uac00 \uc791\uc5c5\uc744 \uc774\uc5b4\uc11c \ud558\uac8c \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub798\uc11c \uc774\uc804 \uc2a4\ud540\ub77d\uc5d0\uc11c\ub294 \uacc4\uc18d \ubc18\ubcf5\ubb38\uc744 \ud655\uc778\ud558\uae30 \ub54c\ubb38\uc5d0 \ubd88\ud544\uc694\ud55c \uc5f0\uc0b0\uc774 \uc9c0\uc18d\uc801\uc73c\ub85c \uc0dd\uae30\uac8c \ub420\uac83\uc774\ub2e4. (\ubc14\ub85c \ub77d\uc744 \uc5bb\uc73c\uba74 \uc774\uc0c1\uc801\uc774\uc9c0\ub9cc \uadf8\ub807\uc9c0 \uc54a\uc74c)<\/li>\n\n\n\n<li>\uadf8\ub798\uc11c \uc815\ud574\uc9c4 \uc2dc\uac04\ub9cc\ud07c \uc26c\uace0 \uadf8\ub2e4\uc74c\uc5d0 \ud655\uc778\ud558\uac8c \ud558\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ucc38\uace0\ub85c <code>this_thread::yield()<\/code>\ub3c4 \uc788\ub294\ub370 \uc774\uac70\ub294 \uadf8\ub0e5 <code>sleep_for(0ms)<\/code>\uacfc \uac19\ub2e4\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Event<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc774\ubca4\ud2b8\ub97c \uc774\uc6a9\ud55c \ub3d9\uae30\ud654 \ubc29\ubc95\uc774 \uc0ac\uc2e4 \uac00\uc7a5 \uc88b\ub2e4. \uadf8 \uc774\uc720\ub294 \uc6ec\ub9cc\ud55c \uc0c1\ud669\uc5d0\uc11c \ub192\uc740 \ud6a8\uc728\uc744 \ubcf4\uc5ec\uc8fc\uae30 \ub54c\ubb38\uc774\ub2e4. \ubb3c\ub860 \ub77d\uc744 \uc624\ub798 \uc810\uc720\ud558\uc9c0 \uc54a\ub294 \uc0c1\ud669\uc5d0\uc11c\ub294 context switch\ube44\uc6a9\uc774 \uc0dd\uac01\ubcf4\ub2e4 \ud06c\uae30 \ub54c\ubb38\uc5d0 \uc2a4\ud540\ub77d\uc774 \uc720\ub9ac\ud558\uaca0\uc9c0\ub9cc \uadf8\ub7f0 \uacbd\uc6b0\ub294 \ub9ce\uc774 \uc5c6\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Event\ub294 \uae30\ubcf8\uc801\uc73c\ub85c 2\uac00\uc9c0 \uc0c1\ud0dc\uac00 \uc788\ub2e4. \ubc14\ub85c signal \uc774\ub791 unsignal \uc0c1\ud0dc\uc774\ub2e4. \uc2dc\uadf8\ub110\uc774 \ub418\uc5b4\uc788\uc73c\uba74 \uc7a0\ub4e4\uc5b4\uc788\ub294 \uc2a4\ub808\ub4dc\ub97c \uae68\uc6b0\uace0 \uc544\ub2c8\uba74 \ub0c5\ub450\ub294 \uac1c\ub150\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc2dc\uadf8\ub110 \uc0c1\ud0dc\ub97c \ud0a4\ub294 \uac83\uc740 \uadf8 \ub370\uc774\ud130\ub97c \uc810\uc720\ud558\uace0 \uc788\ub358 \uc2a4\ub808\ub4dc\uac00 \ub098\uac00\uba74\uc11c \uc2dc\uadf8\ub110\uc758 \uc0c1\ud0dc\ub97c \ubc14\uafb8\uac8c \ub41c\ub2e4. \uadf8\ub7ec\uba74 OS\ub294 \uadf8\uac78 \ubcf4\uace0 \ub300\uae30\uc911\uc774\ub358 \uc2a4\ub808\ub4dc\ud55c\ud14c \uc54c\ub824\uc8fc\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>mutex m;\nqueue&lt;int32&gt; q;\n\nvoid Producer()\n{\n\twhile (true)\n\t{\n\t\t{\n\t\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\t\tq.push(100);\n\t\t}\n\t\tthis_thread::sleep_for(chrono::milliseconds(1));\n\t}\n}\n\nvoid Consumer()\n{\n\twhile (true)\n\t{\n\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\tif (!q.empty())\n\t\t{\n\t\t\tint32 value = q.front();\n\t\t\tq.pop();\n\t\t\tcout &lt;&lt; value &lt;&lt; endl;\n\t\t}\n\t}\n}\n\nint main()\n{\n\tthread t1(Producer);\n\tthread t2(Consumer);\n\n\tt1.join();\n\tt2.join();\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ub7f0 \ucf54\ub4dc\uac00 \uc788\ub2e4\uba74 \uc815\uc0c1\uc801\uc73c\ub85c \ub3d9\uc791\ud558\ub294\uac78 \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/li>\n\n\n\n<li>\uadfc\ub370 \uc5ec\uae30\uc11c \ub9cc\uc57d\uc5d0 \uc5b4\ub5a4 producer\uc758 \uc791\uc5c5\uc774 \uc5c4\uccad \uac00\ub054 \ud55c\ubc88\uc529\ub9cc \ub123\uc5b4\uc8fc\ub294 \uc791\uc5c5\uc774\ub77c 1\uc2dc\uac04\uc5d0 \ud55c\ubc88\ub9cc \ub123\uc5b4\uc900\ub2e4\uba74 \uc5b4\ub5a8\uae4c?<\/li>\n\n\n\n<li>Consumer\ub294 \uadf8 \uc0ac\uc2e4\ub3c4 \ubaa8\ub978\ucc44 \uacc4\uc18d\ud574\uc11c \ubb34\ud55c\ub8e8\ud504\ub97c \ub3cc\uba74\uc11c \uc790\uc6d0\uc744 \ub0ad\ube44\ud558\uace0 \uc788\uc744 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ub530\ub77c\uc11c \uc774\ub7f0\uacbd\uc6b0\ub294 \ucee4\ub110 \uc624\ube0c\uc81d\ud2b8\uc5d0 \uc791\uc5c5\uc744 \uc704\uc784\ud558\uace0 \ubb54\uac00 \uc624\uba74 \uc2e0\ud638\ub97c \uc8fc\uac8c\ub054 \ub9cc\ub4e4 \uc5b4 \uc8fc\uba74 \ud6a8\uc728\uc801\uc73c\ub85c \uad00\ub9ac\ud560 \uc218 \uc788\uc744 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\ucc38\uace0\ub85c \ucee4\ub110\ub85c \ub118\uae30\uac8c \ub418\uba74 context switch \ube44\uc6a9\uc774 \ubc1c\uc0dd\ud558\uae34 \ud558\uc9c0\ub9cc \ucee4\ub110\uc5d0\uc11c\ub294 \uc5ec\ub7ec \ub514\uc2a4\ud328\uccd0\uc640 \uc2a4\ucf00\uc904\ub9c1\uc73c\ub85c \ud6a8\uc728\uc801\uc73c\ub85c \uc791\uc5c5\uc774 \uc654\ub294\uc9c0 \ub4f1\ub4f1\uc744 \uac80\uc0ac\ud560 \uc218 \uc788\ub2e4.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>mutex m;\nqueue&lt;int32&gt; q;\nHANDLE handle;\n\nvoid Producer()\n{\n\twhile (true)\n\t{\n\t\t{\n\t\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\t\tq.push(100);\n\t\t}\n\t\t::SetEvent(handle); \/\/ \uc2e0\ud638\ub97c signal \uc0c1\ud0dc\ub85c \ubcc0\uacbd\n\t\tthis_thread::sleep_for(chrono::milliseconds(1));\n\t}\n}\n\nvoid Consumer()\n{\n\twhile (true)\n\t{\n\t\t::WaitForSingleObject(handle, INFINITE); \/\/ signal \uc0c1\ud0dc\uac00 \ub420 \ub54c\uae4c\uc9c0 \ub300\uae30\n\n\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\tif (!q.empty())\n\t\t{\n\t\t\tint32 value = q.front();\n\t\t\tq.pop();\n\t\t\tcout &lt;&lt; value &lt;&lt; endl;\n\t\t}\n\t}\n}\n\nint main()\n{\n\t\/\/ \ucee4\ub110 \uc624\ube0c\uc81d\ud2b8\n\t\/\/ Useage Count (\uc774 \uc624\ube0c\uc81d\ud2b8\ub97c \uba87\uba85\uc774 \uc0ac\uc6a9\ud558\uace0 \uc788\ub294\uc9c0)\n\t\/\/ Signal \/ Non-Signal (\uc2e0\ud638 \/ \ube44\uc2e0\ud638)\n\t\/\/ Auto Reset \/ Manual Reset (\uc790\ub3d9 \ub9ac\uc14b \/ \uc218\ub3d9 \ub9ac\uc14b)\n\thandle = ::CreateEvent(NULL\/*\ubcf4\uc548 \uc18d\uc131*\/, FALSE\/*manual Reset*\/, FALSE, NULL);\n\tthread t1(Producer);\n\tthread t2(Consumer);\n\n\tt1.join();\n\tt2.join();\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\ubca4\ud2b8\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 \uac00\uc7a5 \uae30\ubcf8\uc801\uc73c\ub85c <code>CreateEvent<\/code>\ud568\uc218\ub97c \uc774\uc6a9\ud574\uc11c \ucee4\ub110 \uc624\ube0c\uc81d\ud2b8\ub97c \ub9cc\ub4e0\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub807\uac8c \ub418\uba74 handle\uc774\ub77c\ub294 \uac12\uc744 \ub118\uaca8\uc8fc\uac8c \ub418\ub294\ub370 \uc774\uac70\ub294 \uadf8\ub0e5 \ucee4\ub110 \uc624\ube0c\uc81d\ud2b8\uc758 \ubc88\ud638\ud45c(int)\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/li>\n\n\n\n<li>\uadf8\ub7ec\uace0 \ub098\uc11c <code>SetEvent<\/code>\ub97c \ud1b5\ud574\uc11c \uc2e0\ud638\ub97c \uc8fc\uac8c \ub418\uba74, <code>WaitForSigleObjece<\/code>\uc640 \uac19\uc774 \uc2e0\ud638\ub97c \uae30\ub2e4\ub9ac\uace0 \uc788\ub358 \ubd80\ubd84\uc5d0\uc11c \ud1b5\uacfc\uac00 \ub418\uba74\uc11c \uc791\uc5c5\uc744 \uc218\ud589\ud560 \uc218 \uc788\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub807\uac8c \ud574\uc11c \uc2e4\uc81c\ub85c \uc791\uc5c5\ud574\ubcf4\uba74 cpu\uc758 \uc0ac\uc6a9\ub960\uc774 \ud604\uc800\ud788 \ub5a8\uc5b4\uc9c4 \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4. (\uc57c\ud638~)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Condition Variable<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">condition variable\uc740 \ud2b9\uc815 \uc870\uac74\uc774 \ub420 \ub54c \uae4c\uc9c0 \uc2a4\ub808\ub4dc\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \ub300\uae30\uc2dc\ud0a4\ub294 \ub3d9\uae30\ud654 \ub3c4\uad6c\uc774\ub2e4. \ucc38\uace0\ub85c \uc774\ubca4\ud2b8\uc640 \ube44\uc2b7\ud558\uac8c \ub3d9\uc791\uc744 \ud558\ub294 \uac1c\ub150\uc778\ub370, \ucee4\ub110 \uc624\ube0c\uc81d\ud2b8\ub294 \uc544\ub2c8\uace0 user-level \uc624\ube0c\uc81d\ud2b8\uc774\ub2e4. \ub530\ub77c\uc11c \ubb54\uac00 \uc790\uc8fc \uc77c\uc5b4\ub098\ub294 \uadf8\ub7f0 \uc791\uc5c5\uc774\ub77c\uba74 \uc720\uc6a9\ud558\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\uadf8\ub9ac\uace0 \uadf8\ub0e5 \ucee4\ub110\uc624\ube0c\uc81d\ud2b8\uc640\uc758 \ucc28\uc774\uc810\uc774\ub77c\uace0 \ud55c\ub2e4\uba74 \ubcf4\ud1b5 \ub77d\uc774\ub791 \uc9dd\uc9c0\uc5b4\uc11c \uc0ac\uc6a9\ud55c\ub2e4. \uc544\ub798 \uc608\uc2dc\ub97c \uc0b4\ud3b4\ubcf4\uc790.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>condition_variable cv;\n\nvoid Producer()\n{\n\twhile (true)\n\t{\n\t\t{\n\t\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\t\tq.push(100);\n\t\t}\n\t\t\n\t\tcv.notify_one(); \/\/ wait\uc911\uc778 \uc2a4\ub808\ub4dc 1\uac1c\ub97c \uae68\uc6b4\ub2e4.\n\t}\n}\n\nvoid Consumer()\n{\n\twhile (true)\n\t{\n\t\tunique_lock&lt;mutex&gt; lock(m);\n\t\tcv.wait(lock, &#091;]() {return q.empty() == false;});\n\t\t\/\/ 1.\ub77d\uc744 \uac74\ub2e4.\n\t\t\/\/ 2. \uc870\uac74 \ud655\uc778\n\t\t\/\/ IF \uc870\uac74\uc774 True -&gt; \ube60\uc838\ub098\uc640\uc11c \uc774\uc5b4\uc11c \ucf54\ub4dc\ub97c \uc9c4\ud589\n\t\t\/\/ IF \uc870\uac74\uc774 False -&gt; \ub77d\uc744 \ud480\uace0 \ub300\uae30 \uc0c1\ud0dc\ub85c \ub4e4\uc5b4\uac10.\n\t\t{\n\t\t\tint32 value = q.front();\n\t\t\tq.pop();\n\t\t\tcout &lt;&lt; value &lt;&lt; endl;\n\t\t}\n\t}\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\uc804 \ucf54\ub4dc\uc640 \ub2ec\ub77c\uc9c4 \uc810\uc740 condition_variable\uc744 \uc0ac\uc6a9\ud55c\ub2e4\ub294 \uc810\uc774\ub2e4.<\/li>\n\n\n\n<li>\uae30\ubcf8 \uac1c\ub150\uc740 \ub77d\uc744 \uc7a1\uace0 condition variable\uc744 \ubc14\uafb8\uace0, \ub77d\uc744 \ud480\uace0 \uc870\uac74\ubcc0\uc218\ub97c \ud1b5\ud574 \ub2e4\ub978 \uc2a4\ub808\ub4dc\uc5d0\uac8c \uc54c\ub9ac\uba74 \ub418\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub807\uac8c \ub418\uba74 \ubc14\ub85c \ub300\uae30 \uc0c1\ud0dc\ub85c \ube60\uc9c0\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \uc870\uac74\uc744 \ud655\uc778\ud574\uc11c \ub9cc\uc871\uc744 \uc548\ud558\uba74 \ub77d\uc744 \ud480\uace0 \ub300\uae30\uc0c1\ud0dc\uac00 \ub41c\ub2e4\ub294 \uac83\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc790 \uadf8\ub7ec\uba74 \uc54c\ub2e4\uc2f6\uc774 \ub77d\uc744 \uc9c0\uae08 wait\ud568\uc218 \ub0b4\ubd80\uc5d0\uc11c \ud480\uc218 \uc788\ub294 \uac00\ub2a5\uc131\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 &#8220;\ubb34\uc870\uac74&#8221; unique lock\uc744 \ubc1b\uc544\uc918\uc11c \ub098\uc911\uc5d0 \uc0c1\ud0dc\ub97c \ubc14\uafc0 \uc218 \uc788\uac8c \ud574\uc918\uc57c \ud55c\ub2e4. (lock_guard\ub294 \uc624\ub958).<\/li>\n\n\n\n<li>\ub2e4\uc2dc wait\uc744 \ub9cc\ub098\uba74 lock\uc744 \ub2e4\uc2dc \uac78\uace0 \ud655\uc778\uc744 \ud558\uace0 \ub9cc\uc871\ud558\uba74 \uadf8\ub54c \uc774\uc81c \uc791\uc5c5\uc744 \uc218\ud589\ud558\uac8c \ub418\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Producer &#8211; Consumer \ud328\ud134<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\ub300\ud559\uad50 OS \uacfc\ubaa9\uc5d0\uc11c \ubc30\uc6e0\ub358 \uac78 \uadf8\ub300\ub85c \ub2e4\uc2dc \uacf5\ubd80\ud558\ub2c8\uae4c \ucc38 \uc2e0\uae30\ud558\uba74\uc11c\ub3c4 \uc9c4\uc791 \ud560\uaec4 \uadf8\ub7ac\ub2e4\ub294 \uc0dd\uac01\uc774\ub4e0\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774 \ud328\ud134\uc740 \ub9d0 \uadf8\ub300\ub85c \uc0dd\uc131\ud558\ub294 \uac83\uacfc \uc18c\ube44\ud558\ub294 \uac83\uc744 \ub098\ub208\ub2e4\ub294 \uac1c\ub150\uc774\ub2e4.<\/li>\n\n\n\n<li>FIFO(\uc120\uc785\uc120\ucd9c)\ub85c \ubcf4\ud1b5 \uc124\uacc4\ud558\uae30 \ub54c\ubb38\uc5d0 <code>queue<\/code>\ub97c \uc774\uc6a9\ud55c\ub2e4.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1432\" height=\"598\" src=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6.png\" alt=\"\" class=\"wp-image-44\" style=\"width:500px;height:auto\" srcset=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6.png 1432w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6-300x125.png 300w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6-1024x428.png 1024w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6-768x321.png 768w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-6-18x8.png 18w\" sizes=\"auto, (max-width: 1432px) 100vw, 1432px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub531 \uc774\ub7f0 \uac1c\ub150\uc774\ub2e4. \uc6d0\uc18c\ub97c \ud050\uc5d0 \ub123\uace0 \uc18c\ube44\ud558\uae30.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;chrono&gt;\n#include &lt;iostream&gt;\n#include &lt;mutex&gt;\n#include &lt;queue&gt;\n#include &lt;string&gt;\n#include &lt;thread&gt;\n#include &lt;vector&gt;\n\nvoid producer(std::queue&lt;std::string&gt;* downloaded_pages, std::mutex* m,\n              int index) {\n  for (int i = 0; i &lt; 5; i++) {\n    \/\/ \uc6f9\uc0ac\uc774\ud2b8\ub97c \ub2e4\uc6b4\ub85c\ub4dc \ud558\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc774\ub77c \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.\n    \/\/ \uac01 \uc4f0\ub808\ub4dc \ubcc4\ub85c \ub2e4\uc6b4\ub85c\ub4dc \ud558\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc774 \ub2e4\ub974\ub2e4.\n    std::this_thread::sleep_for(std::chrono::milliseconds(100 * index));\n    std::string content = \"\uc6f9\uc0ac\uc774\ud2b8 : \" + std::to_string(i) + \" from thread(\" +\n                          std::to_string(index) + \")\\n\";\n\n    \/\/ data \ub294 \uc4f0\ub808\ub4dc \uc0ac\uc774\uc5d0\uc11c \uacf5\uc720\ub418\ubbc0\ub85c critical section \uc5d0 \ub123\uc5b4\uc57c \ud55c\ub2e4.\n    m-&gt;lock();\n    downloaded_pages-&gt;push(content);\n    m-&gt;unlock();\n  }\n}\n\nvoid consumer(std::queue&lt;std::string&gt;* downloaded_pages, std::mutex* m,\n              int* num_processed) {\n  \/\/ \uc804\uccb4 \ucc98\ub9ac\ud558\ub294 \ud398\uc774\uc9c0 \uac1c\uc218\uac00 5 * 5 = 25 \uac1c.\n  while (*num_processed &lt; 25) {\n    m-&gt;lock();\n    \/\/ \ub9cc\uc77c \ud604\uc7ac \ub2e4\uc6b4\ub85c\ub4dc\ud55c \ud398\uc774\uc9c0\uac00 \uc5c6\ub2e4\uba74 \ub2e4\uc2dc \ub300\uae30.\n    if (downloaded_pages-&gt;empty()) {\n      m-&gt;unlock();\n\n      \/\/ 10 \ubc00\ub9ac\ucd08 \ub4a4\uc5d0 \ub2e4\uc2dc \ud655\uc778\ud55c\ub2e4.\n      std::this_thread::sleep_for(std::chrono::milliseconds(10));\n      continue;\n    }\n\n    \/\/ \ub9e8 \uc55e\uc758 \ud398\uc774\uc9c0\ub97c \uc77d\uace0 \ub300\uae30 \ubaa9\ub85d\uc5d0\uc11c \uc81c\uac70\ud55c\ub2e4.\n    std::string content = downloaded_pages-&gt;front();\n    downloaded_pages-&gt;pop();\n\n    (*num_processed)++;\n    m-&gt;unlock();\n\n    \/\/ content \ub97c \ucc98\ub9ac\ud55c\ub2e4.\n    std::cout &lt;&lt; content;\n    std::this_thread::sleep_for(std::chrono::milliseconds(80));\n  }\n}\n\nint main() {\n  \/\/ \ud604\uc7ac \ub2e4\uc6b4\ub85c\ub4dc\ud55c \ud398\uc774\uc9c0\ub4e4 \ub9ac\uc2a4\ud2b8\ub85c, \uc544\uc9c1 \ucc98\ub9ac\ub418\uc9c0 \uc54a\uc740 \uac83\ub4e4\uc774\ub2e4.\n  std::queue&lt;std::string&gt; downloaded_pages;\n  std::mutex m;\n\n  std::vector&lt;std::thread&gt; producers;\n  for (int i = 0; i &lt; 5; i++) {\n    producers.push_back(std::thread(producer, &amp;downloaded_pages, &amp;m, i + 1));\n  }\n\n  int num_processed = 0;\n  std::vector&lt;std::thread&gt; consumers;\n  for (int i = 0; i &lt; 3; i++) {\n    consumers.push_back(\n        std::thread(consumer, &amp;downloaded_pages, &amp;m, &amp;num_processed));\n  }\n\n  for (int i = 0; i &lt; 5; i++) {\n    producers&#091;i].join();\n  }\n  for (int i = 0; i &lt; 3; i++) {\n    consumers&#091;i].join();\n  }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>producer\uc740 \ucd1d 5\uac1c\ub97c \uc21c\ucc28\uc801\uc73c\ub85c push\ud55c\ub2e4. (\ucd1d 25\uac1c)<\/li>\n\n\n\n<li>consumer\uc740 \uc21c\ucc28\uc801\uc73c\ub85c \uc774\ub97c \uc18c\ube44 (\ucd9c\ub825) \ud55c\ub2e4.<\/li>\n\n\n\n<li>\uc774\ub54c \ub77d\uc744 \uc6b4\uc6a9\ud574\uc11c race condition\uc744 \ubc29\uc9c0\ud55c\ub2e4.<\/li>\n\n\n\n<li>\ucc38\uace0\ub85c consumer\uc774\ub791 producer\uc774 \uac19\uc740 mutex\ub97c \uc6b4\uc6a9\ud558\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0 consumer\uac00 \ub300\uae30 \ud574\uc57c \ud558\ub294 \uc0c1\ud669\uc774\uba74 \ubc14\ub85c \ub77d\uc744 \ubc18\ub0a9\ud574\uc57c producer\uac00 \uc0dd\uc131\ud560 \uc218 \uc788\ub2e4.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1344\" height=\"860\" src=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2.png\" alt=\"\" class=\"wp-image-40\" style=\"width:600px;height:auto\" srcset=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2.png 1344w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2-300x192.png 300w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2-1024x655.png 1024w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2-768x491.png 768w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-2-18x12.png 18w\" sizes=\"auto, (max-width: 1344px) 100vw, 1344px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud558\uc9c0\ub9cc \uc9c0\uae08 consumer\uc740 \ub9e4\uc6b0 \ube44\ud6a8\uc728\uc801\uc778\ub370, \uadf8 \uc774\uc720\ub294 \uc815\ud574\uc9c4 \uc2dc\uac04\ub9c8\ub2e4 \uc77c\uc774 \uc788\ub294\uc9c0 \uacc4\uc18d \uc77c\uc5b4\ub098\uc11c \ud655\uc778\ud558\uace0 \uc788\ub2e4\ub294 \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1364\" height=\"1036\" src=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5.png\" alt=\"\" class=\"wp-image-43\" style=\"width:600px;height:auto\" srcset=\"https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5.png 1364w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5-300x228.png 300w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5-1024x778.png 1024w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5-768x583.png 768w, https:\/\/corpusgame.com\/wp-content\/uploads\/2026\/09\/image-5-16x12.png 16w\" sizes=\"auto, (max-width: 1364px) 100vw, 1364px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc544\ub9c8 \uc774\ub7f0\uc2dd\uc73c\ub85c \uc77c\uc774 \uc5c6\uc73c\uba74 consumer \uc2a4\ub808\ub4dc\ub294 \uadf8\ub0e5 \uc790\uace0 \uc788\uace0, producer\uc5d0\uc11c \uc77c\uc774 \uc654\ub2e4\ub294 \uac78 \uc54c\ub9ac\ub294\uac8c \uac00\uc7a5 \uc774\uc0c1\uc801\uc77c \uac83\uc774\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ucc38\uace0 \uc790\ub8cc<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/modoocode.com\/270\" target=\"_blank\" rel=\"noopener\">\uc539\uc5b4\uba39\ub294 C++ &#8211; 15.2 Mutex<\/a><\/p>\n<\/blockquote>","protected":false},"excerpt":{"rendered":"<p>Race Condition \uc11c\ub85c \ub2e4\ub978 Thread\uc5d0\uc11c \uac19\uc740 \uba54\ubaa8\ub9ac\ub97c \uacf5\uc720\ud560 \ub54c \uac19\uc740 \uc790\uc6d0\uc744 \uc0ac\uc6a9\ud558\uba74\uc11c \uac12\uc774 \uc774\uc0c1\ud558\uac8c \ub418\ub294 \uac83\uc744 race condition\uc774\ub77c\uace0 \ud55c\ub2e4.\uc2dc\uc791\ud558\uae30\uc5d0 \uc55e\uc11c \ubaa8\ub4e0 STL\ub4e4\uc740 \uae30\ubcf8\uc801\uc73c\ub85c \uba40\ud2f0\uc2a4\ub808\ub4dc \ud658\uacbd\uc744 \uc81c\uacf5\ud558\uc9c0 \uc54a\ub294\ub2e4\uace0 \uc54c\uc544\uc57c \ud55c\ub2e4. \uc544\ub2c8 \uc2a4\ub808\ub4dc1\uc5d0\uc11c 3\uc744 \ub300\uc785\ud558\ub824\uace0 \ud558\uace0 \uc2a4\ub808\ub4dc2\uc5d0\uc11c 5\ub97c \ub300\uc785\ud558\ub824\uace0 \ud558\ub294 \uc0c1\ud669\uc774 \uc544\ub2c8\uace0 \uadf8\ub0e5 \uc11c\ub85c \ub354\ud558\uae30\ub9cc \ud558\ub294\ub370\ub3c4 \uc624\ub958\uac00 \uc0dd\uae34\ub2e4\uace0? \uc774\uac74 \ubb54\uac00 \uc798\ubabb\ub410\ub2e4. \uc774\uac70\ub97c \uc774\ud574\ud558\uae30 \uc704\ud574\uc11c\ub294 counter+=1\uc774 \uc2e4\uc81c\ub85c \uc5b4\ub5bb\uac8c &#8230; <a title=\"[C++] Lock, Mutex, condition variable\" class=\"read-more\" href=\"https:\/\/corpusgame.com\/en\/cpp-lock\/\" aria-label=\"More on [C++] Lock, Mutex, condition variable\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[12,18,16,17,19],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-cpp-basic-guide","tag-c","tag-condition","tag-lock","tag-mutex","tag-variable"],"_links":{"self":[{"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/comments?post=39"}],"version-history":[{"count":1,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":45,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/posts\/39\/revisions\/45"}],"wp:attachment":[{"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/media?parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/categories?post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/corpusgame.com\/en\/wp-json\/wp\/v2\/tags?post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}