{"id":217,"date":"2023-12-12T15:33:36","date_gmt":"2023-12-12T07:33:36","guid":{"rendered":"https:\/\/blog.zwdblog.online\/?p=217"},"modified":"2023-12-12T21:37:52","modified_gmt":"2023-12-12T13:37:52","slug":"%e7%94%9f%e4%ba%a7%e8%80%85-%e6%b6%88%e8%b4%b9%e8%80%85%e9%97%ae%e9%a2%98%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/blog.zwdblog.online\/index.php\/2023\/12\/12\/%e7%94%9f%e4%ba%a7%e8%80%85-%e6%b6%88%e8%b4%b9%e8%80%85%e9%97%ae%e9%a2%98%e5%ae%9e%e7%8e%b0\/","title":{"rendered":"\u751f\u4ea7\u8005\u2014\u2014\u6d88\u8d39\u8005\u95ee\u9898\u5b9e\u73b0\uff08\u4e24\u4e2a\u751f\u4ea7\u8005\u548c\u4e24\u4e2a\u6d88\u8d39\u8005\uff09"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e00\u3001\u751f\u4ea7\u8005\u2014\u2014\u6d88\u8d39\u8005\u95ee\u9898<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u5c31\u662f\u4e00\u4e2a\u5e76\u53d1\u7f16\u7a0b\u95ee\u9898\uff0c\u751f\u4ea7\u8005\u8d1f\u8d23\u751f\u4ea7\u4ea7\u54c1\u5e76\u653e\u7f6e\u5230\u5171\u4eab\u7684\u7f13\u51b2\u533a\u4e2d\uff0c\u800c\u6d88\u8d39\u8005\u5219\u4ece\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\u4ea7\u54c1\u5e76\u6d88\u8d39\u5b83\u4eec\u3002\u4e24\u8005\u9700\u8981\u5728\u5171\u4eab\u8d44\u6e90\u4e0a\u8fdb\u884c\u534f\u4f5c\uff0c\u786e\u4fdd\u751f\u4ea7\u8005\u4e0d\u4f1a\u5728\u7f13\u51b2\u533a\u6ee1\u65f6\u7ee7\u7eed\u751f\u4ea7\uff0c\u6d88\u8d39\u8005\u4e5f\u4e0d\u4f1a\u5728\u7f13\u51b2\u533a\u7a7a\u65f6\u7ee7\u7eed\u6d88\u8d39\u3002\u7b80\u5355\u6982\u62ec\u4e3a\u4e00\u6b21\u53ea\u80fd\u653e\u4e00\u4e2a\u4ea7\u54c1\uff0c\u4e00\u6b21\u53ea\u80fd\u53d6\u8d70\u4e00\u4e2a\u4ea7\u54c1\uff0c\u7f13\u51b2\u533a\u6ee1\u5219\u751f\u4ea7\u8005\u4e0d\u80fd\u653e\u4ea7\u54c1\uff0c\u7f13\u51b2\u533a\u7a7a\u5219\u6d88\u8d39\u8005\u4e0d\u80fd\u53d6\u4ea7\u54c1\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8c\u3001\u57fa\u672c\u5b9e\u73b0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a\u5927\u5c0f\u4e3a10\u7684\u7f13\u51b2\u533a\uff0c\u521d\u59cb\u72b6\u6001\u4e3a\u7a7a\uff1b<\/li>\n\n\n\n<li>2\u4e2a\u751f\u4ea7\u8005\uff0c\u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u5f80\u7f13\u51b2\u533a\u4e2d\u6dfb\u52a0\u6570\u636e\uff0c\u82e5\u7f13\u51b2\u533a\u5df2\u6ee1\uff0c\u7b49\u5f85\u6d88\u8d39\u8005\u53d6\u8d70\u6570\u636e\u540e\u518d\u6dfb\u52a0\uff0c\u91cd\u590d10\u6b21<\/li>\n\n\n\n<li>2\u4e2a\u6d88\u8d39\u8005\uff0c\u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u4ece\u7f13\u51b2\u533a\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u82e5\u7f13\u51b2\u533a\u4e3a\u7a7a\uff0c\u7b49\u5f85\u751f\u4ea7\u8005\u6dfb\u52a0\u6570\u636e\u540e\u518d\u8bfb\u53d6\uff0c\u91cd\u590d10\u6b21<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u3001\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784\u548c\u8bf4\u660e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2460\u3000buffer \u5217\u8868\uff1a\u8fd9\u662f\u7f13\u51b2\u533a\uff0c\u7528\u4e8e\u5b58\u50a8\u751f\u4ea7\u8005\u751f\u4ea7\u7684\u7269\u54c1\u3002\u5b83\u662f\u4e00\u4e2a\u5171\u4eab\u7684\u6570\u636e\u7ed3\u6784\uff0c\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u8bfb\u53d6\u548c\u5199\u5165\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f7f\u7528\u5217\u8868\u6765\u8868\u793a\u7f13\u51b2\u533a\u3002<br>\u2461\u3000buffer_lock \u9501\uff1a\u8fd9\u662f\u4e00\u4e2a\u4e92\u65a5\u9501\uff0c\u7528\u4e8e\u786e\u4fdd\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u5bf9\u7f13\u51b2\u533a\u7684\u8bbf\u95ee\u662f\u5b89\u5168\u7684\u3002\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u60f3\u8981\u8bbf\u95ee\u7f13\u51b2\u533a\u65f6\uff0c\u5b83\u5fc5\u987b\u5148\u83b7\u53d6\u8fd9\u4e2a\u9501\uff0c\u4ee5\u786e\u4fdd\u5176\u4ed6\u7ebf\u7a0b\u4e0d\u4f1a\u540c\u65f6\u4fee\u6539\u7f13\u51b2\u533a\u3002<br>\u2462\u3000empty \u4fe1\u53f7\u91cf\uff1a\u8fd9\u662f\u4e00\u4e2a\u4fe1\u53f7\u91cf\uff0c\u7528\u4e8e\u8868\u793a\u7f13\u51b2\u533a\u7684\u7a7a\u95f2\u4f4d\u7f6e\u6570\u91cf\u3002\u751f\u4ea7\u8005\u4f1a\u5728\u6dfb\u52a0\u7269\u54c1\u5230\u7f13\u51b2\u533a\u4e4b\u524d\u5c1d\u8bd5\u83b7\u53d6\u8fd9\u4e2a\u4fe1\u53f7\u91cf\uff0c\u4ee5\u786e\u4fdd\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u3002\u5f53\u4e00\u4e2a\u751f\u4ea7\u8005\u83b7\u53d6\u4e86\u4fe1\u53f7\u91cf\u540e\uff0cempty\u7684\u503c\u4f1a\u51cf\u5c11\uff0c\u8868\u793a\u7f13\u51b2\u533a\u7684\u7a7a\u95f2\u4f4d\u7f6e\u51cf\u5c11\u4e86\u3002<br>\u2463\u3000full \u4fe1\u53f7\u91cf\uff1a\u8fd9\u662f\u53e6\u4e00\u4e2a\u4fe1\u53f7\u91cf\uff0c\u7528\u4e8e\u8868\u793a\u7f13\u51b2\u533a\u4e2d\u7684\u7269\u54c1\u6570\u91cf\u3002\u6d88\u8d39\u8005\u4f1a\u5728\u4ece\u7f13\u51b2\u533a\u53d6\u51fa\u7269\u54c1\u4e4b\u524d\u5c1d\u8bd5\u83b7\u53d6\u8fd9\u4e2a\u4fe1\u53f7\u91cf\uff0c\u4ee5\u786e\u4fdd\u7f13\u51b2\u533a\u4e2d\u6709\u7269\u54c1\u53ef\u4f9b\u53d6\u51fa\u3002\u5f53\u4e00\u4e2a\u6d88\u8d39\u8005\u83b7\u53d6\u4e86\u4fe1\u53f7\u91cf\u540e\uff0cfull\u7684\u503c\u4f1a\u51cf\u5c11\uff0c\u8868\u793a\u7f13\u51b2\u533a\u4e2d\u7684\u7269\u54c1\u6570\u91cf\u51cf\u5c11\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56db\u3001python\u5b9e\u73b0\u7684\u7a0b\u5e8f\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"font-size:18px\"><code>import threading\nimport time\nimport random\n\n# \u7f13\u51b2\u533a\u5927\u5c0f\nBUFFER_SIZE = 10\n\n# \u5171\u4eab\u7f13\u51b2\u533a\uff0c\u521d\u59cb\u72b6\u6001\u4e3a\u7a7a\nbuffer = &#91;]\n# \u521b\u5efa\u4e92\u65a5\u9501\nbuffer_lock = threading.Lock()\n\n# \u4fe1\u53f7\u91cf\uff0c\u7528\u4e8e\u63a7\u5236\u7f13\u51b2\u533a\u7684\u7a7a\u548c\u6ee1\u72b6\u6001\nempty = threading.Semaphore(BUFFER_SIZE)\nfull = threading.Semaphore(0)\n\n# \u751f\u4ea7\u8005\u51fd\u6570\ndef producer(id):\n   for i in range(10):\n        time.sleep(random.uniform(0, 1)) # sleep\u4f7f\u5176\u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\n        item = f\"Item-{i} by Producer-{id}\" # \u7269\u54c1\n        \n        empty.acquire()           # \u4e3a\u7a7a\n        buffer_lock.acquire() # \u5f97\u5230\u9501\n        buffer.append(item)          # \u653e\u5165\u7f13\u51b2\u533a\n        print(f\"Producer-{id} produced {item}\")\n        buffer_lock.release() # \u91ca\u653e\u9501\n        full.release()          # \u91ca\u653e\u4fe1\u53f7\n\n# \u6d88\u8d39\u8005\u51fd\u6570\ndef consumer(id):\n   for i in range(10):\n        time.sleep(random.uniform(0, 1)) # \u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\n        \n        full.acquire()          # \u4e0d\u4e3a\u7a7a\n        buffer_lock.acquire()\n        item = buffer.pop(0)\n        print(f\"Consumer-{id} consumed {item}\") \n        buffer_lock.release() \n        empty.release() # \u91ca\u653e\u4fe1\u53f7\n\n# \u521b\u5efa\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7ebf\u7a0b\nproducer_threads = &#91;threading.Thread(target=producer, args=(i,)) for i in range(2)] # \u4e24\u4e2a\u751f\u4ea7\u8005\nconsumer_threads = &#91;threading.Thread(target=consumer, args=(i,)) for i in range(2)] # \u4e24\u4e2a\u6d88\u8d39\u8005\n\n# \u542f\u52a8\u7ebf\u7a0b\nfor thread in producer_threads + consumer_threads:\n          thread.start()\n\n# \u7b49\u5f85\u7ebf\u7a0b\u5b8c\u6210\nfor thread in producer_threads + consumer_threads:\n          thread.join()\n\nprint(\"\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5.\")<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e94\u3001\u7a0b\u5e8f\u8fd0\u884c\u622a\u56fe\u4ee5\u53ca\u8bf4\u660e<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"425\" height=\"828\" src=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-56.png\" alt=\"\u751f\u4ea7\u8005\u6d88\u8d39\u8005\" class=\"wp-image-220\" srcset=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-56.png 425w, https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-56-154x300.png 154w\" sizes=\"auto, (max-width: 425px) 100vw, 425px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u8bf4\u660e\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. \u6709\u4e24\u4e2a\u751f\u4ea7\u8005\u7ebf\u7a0b (Producer-0 \u548c Producer-1) \u548c\u4e24\u4e2a\u6d88\u8d39\u8005\u7ebf\u7a0b (Consumer-0 \u548c Consumer-1) \u540c\u65f6\u8fd0\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. \u751f\u4ea7\u8005\u7ebf\u7a0b\u751f\u6210\u7269\u54c1\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u7f13\u51b2\u533a\uff0c\u6bcf\u6b21\u751f\u6210\u90fd\u4f1a\u6709\u4e00\u4e2a\u9012\u589e\u7684\u5e8f\u53f7 (Item-0, Item-1, Item-2, \u7b49\u7b49)\u3002\u8fd9\u662f\u901a\u8fc7 `Producer-x produced Item-y` \u6765\u8868\u793a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. \u6d88\u8d39\u8005\u7ebf\u7a0b\u4ece\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\u7269\u54c1\uff0c\u5e76\u5c06\u5176\u6d88\u8d39\u3002\u8fd9\u662f\u901a\u8fc7 `Consumer-x consumed Item-y` \u6765\u8868\u793a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. \u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7ebf\u7a0b\u4e4b\u95f4\u7684\u6267\u884c\u662f\u4ea4\u9519\u7684\uff0c\u5b83\u4eec\u4ee5\u4e0d\u540c\u7684\u901f\u5ea6\u5de5\u4f5c\u3002\u751f\u4ea7\u8005\u751f\u6210\u7269\u54c1\uff0c\u7136\u540e\u6d88\u8d39\u8005\u4ece\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\uff0c\u8fd9\u53cd\u6620\u4e86\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u4e4b\u95f4\u7684\u534f\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5. \u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7ebf\u7a0b\u4e4b\u95f4\u7684\u64cd\u4f5c\u662f\u4e92\u65a5\u7684\uff0c\u8fd9\u662f\u7531\u9501 (`buffer_lock`) \u6765\u4fdd\u8bc1\u7684\u3002\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u7f13\u51b2\u533a\u7684\u6570\u636e\uff0c\u8fd9\u786e\u4fdd\u4e86\u6570\u636e\u7684\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">6. \u901a\u8fc7\u4fe1\u53f7\u91cf `empty` \u548c `full` \u7684\u4f7f\u7528\uff0c\u7a0b\u5e8f\u5b9e\u73b0\u4e86\u5bf9\u7f13\u51b2\u533a\u72b6\u6001\u7684\u63a7\u5236\uff0c\u751f\u4ea7\u8005\u53ea\u5728\u7f13\u51b2\u533a\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u65f6\u624d\u751f\u6210\u7269\u54c1\uff0c\u6d88\u8d39\u8005\u53ea\u5728\u7f13\u51b2\u533a\u6709\u7269\u54c1\u65f6\u624d\u8fdb\u884c\u6d88\u8d39\u3002\u8fd9\u907f\u514d\u4e86\u7f13\u51b2\u533a\u6ea2\u51fa\u548c\u4e0b\u6ea2\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u516d\u3001\u7b97\u6cd5\u4e2d\u4f7f\u7528\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(1)\u4e92\u65a5\u9501 (buffer_lock)\uff1a \u8fd9\u4e2a\u9501\u7528\u4e8e\u4fdd\u62a4\u5bf9\u5171\u4eab\u6570\u636e\u7ed3\u6784 buffer \u7684\u8bbf\u95ee\u3002\u5728\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7ebf\u7a0b\u60f3\u8981\u8bfb\u53d6\u6216\u5199\u5165 buffer 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