{"id":534,"date":"2023-03-03T18:33:56","date_gmt":"2023-03-03T09:33:56","guid":{"rendered":"http:\/\/www.frost-lab.net\/?p=534"},"modified":"2023-03-03T18:35:54","modified_gmt":"2023-03-03T09:35:54","slug":"%ec%84%b8%eb%a7%88%ed%8f%ac%ec%96%b4-semaphore","status":"publish","type":"post","link":"https:\/\/www.frost-lab.net\/?p=534","title":{"rendered":"\uc138\ub9c8\ud3ec\uc5b4 (Semaphore)"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" style=\"font-size:25px\"><strong>1. \uc138\ub9c8\ud3ec\uc5b4\uc758 \uac1c\ub150<\/strong><\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\uc815\uc758<\/td><td>\uc2dc\uc2a4\ud15c \uacf5\uc720 \uc790\uc6d0\uc758 race condition \uc0c1\ud0dc \ubc29\uc9c0 \uc704\ud574 P(), V()\uc5f0\uc0b0\uae30\ubc18\uc758 OS \ub808\ubca8\uc5d0\uc11c \uc218\ud589\ud558\ub294 \uc0c1\ud638\ubc30\uc81c \uae30\ubc95<\/td><\/tr><tr><td>\ud2b9\uc9d5<\/td><td>&#8211; \uc815\uc218 \ud615\ud0dc\uc758 \ubcc0\uc218 : \ud1b5\uc0c1 S\ub85c \ubcc0\uc218 \uc815\uc758<br>&#8211; OS \uc218\uc900\uc758 \uc0c1\ud638 \ubc30\uc81c \uae30\ubc95 : P, V\uc5f0\uc0b0 \uc218\ud589 \ud1b5\ud55c \uc784\uacc4 \uad6c\uc5ed \ud1b5\uc81c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" style=\"font-size:25px\"><strong>2. \uc138\ub9c8\ud3ec\uc5b4\uc758 \ub3d9\uc791 \uc6d0\ub9ac\uc640 \uc720\ud615<\/strong><\/h1>\n\n\n\n<h2 class=\"has-regular-font-size wp-block-heading\"><strong>1) \uc138\ub9c8\ud3ec\uc5b4\uc758 \ub3d9\uc791 \uc6d0\ub9ac<\/strong><\/h2>\n\n\n\n<table id=\"tablepress-6\" class=\"tablepress tablepress-id-6 tbody-has-connected-cells\">\n<tbody>\n<tr class=\"row-1\">\n\t<td colspan=\"3\" class=\"column-1\"><center><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.frost-lab.net\/wp-content\/uploads\/\uc138\ub9c8\ud3ec\uc5b4.jpg\" alt=\"\" width=\"312\" height=\"168\" class=\"alignnone size-full wp-image-536\" \/><\/center><\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\"><center>\uc5f0\uc0b0<\/center><\/td><td class=\"column-2\"><center>\ub3d9\uc791<\/center><\/td><td class=\"column-3\"><center>\uc124\uba85<\/center><\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">P\uc5f0\uc0b0 (Wait)<\/td><td class=\"column-2\">S\uac12 1 \u2192 0 \uc73c\ub85c \ubcc0\uacbd<\/td><td class=\"column-3\">\uc784\uacc4\uc601\uc5ed \uc9c4\uc785\ud558\uba70 S\uac12 1\uac1c \ucc28\uac10<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">V\uc5f0\uc0b0 (Signal)<\/td><td class=\"column-2\">S\uac12 0 \u2192 1\ub85c \ubcc0\uacbd<\/td><td class=\"column-3\">\uc784\uacc4\uc601\uc5ed\uc5d0\uc11c \ubcf5\uadc0\ud558\uba70 S\uac12 1\uac1c \ubc18\ud658<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-6 from cache -->\n\n\n<h2 class=\"has-regular-font-size wp-block-heading\"><strong>2) \uc138\ub9c8\ud3ec\uc5b4\uc758 \uc720\ud615<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc720\ud615<\/td><td class=\"has-text-align-left\" data-align=\"left\">\ubaa9\uc801<\/td><td class=\"has-text-align-left\" data-align=\"left\">\ub0b4\uc6a9<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Binary Semaphore<\/td><td class=\"has-text-align-left\" data-align=\"left\">&#8211; \uc0c1\ud638\ubc30\uc81c, \ud504\ub85c\uc138\uc2a4 \ub3d9\uae30\ud654<\/td><td class=\"has-text-align-left\" data-align=\"left\">0 \ub610\ub294 1\ub85c \ubcc0\uc218 \uad6c\uc131<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Count Semaphore<\/td><td class=\"has-text-align-left\" data-align=\"left\">&#8211; \ucd08\uae30\uc5d0 \ub3d9\uc2dc \uc9c4\ud589 \uac00\ub2a5\ud55c \ud504\ub85c\uc138\uc2a4 \uac1c\uc218 \uc815\uc758<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc815\uc218 \ud615\ud0dc\uc758 \ubcc0\uc218<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<h1 class=\"wp-block-heading\" style=\"font-size:25px\"><strong>3. \uc138\ub9c8\ud3ec\uc5b4\uc758 \ud0c0\uc774\ubc0d \uc624\ub958\uc640 \ubaa8\ub2c8\ud130\ub97c \ud1b5\ud55c \ud574\uacb0\ubc29\uc548<\/strong><\/h1>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1091\" height=\"473\" src=\"https:\/\/www.frost-lab.net\/wp-content\/uploads\/\uc138\ub9c8\ud3ec\uc5b4\ubaa8\ub2c8\ud130.jpg\" alt=\"\" class=\"wp-image-544\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P(), V() \uc5f0\uc0b0\uc758 \uc21c\uc11c\uac00 \ub4a4\ubc14\ub00c\ub294 \uacbd\uc6b0 \uc624\ub958 \ubc1c\uc0dd \uac00\ub2a5<\/li>\n\n\n\n<li>Critical Section \uc885\ub8cc \ud6c4 V() \uc5f0\uc0b0 \ub300\uc2e0 P()\uc5f0\uc0b0 \uc218\ud589 \uc2dc \uc624\ub958 \ubc1c\uc0dd \uac00\ub2a5<\/li>\n\n\n\n<li>\ubaa8\ub2c8\ud130 \ub0b4 \uc815\uc758\ud55c \ud568\uc218\ub9cc\uc774 \ubaa8\ub2c8\ud130 \ub0b4\uc5d0 \uc9c0\uc5ed\uc801\uc73c\ub85c \uc120\uc5b8\ub41c \ubcc0\uc218\ub4e4\uacfc \ud615\uc2dd \ub9e4\uac1c\ubcc0\uc218\uc5d0 \uc811\uadfc \uac00\ub2a5\ucf00 \ud568\uc73c\ub85c\uc368 \uc0c1\ud638 \ubc30\uc81c \uad6c\ud604<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. \uc138\ub9c8\ud3ec\uc5b4\uc758 \uac1c\ub150 \uc815\uc758 \uc2dc\uc2a4\ud15c \uacf5\uc720 \uc790\uc6d0\uc758 race condition \uc0c1\ud0dc \ubc29\uc9c0 \uc704\ud574 P(), V()\uc5f0\uc0b0\uae30\ubc18\uc758 OS [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[63],"class_list":["post-534","post","type-post","status-publish","format-standard","hentry","category-caos","tag-caos"],"_links":{"self":[{"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/posts\/534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=534"}],"version-history":[{"count":6,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/posts\/534\/revisions"}],"predecessor-version":[{"id":546,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=\/wp\/v2\/posts\/534\/revisions\/546"}],"wp:attachment":[{"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.frost-lab.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}