41 windows_41_Thread_Semaphore 线程 - 信号

windows_41_Thread_Semaphore 线程 - 信号

1. // windows_41_Thread_Semaphore.cpp : 定义控制台应用程序的入口点。
2. //
4. #include "stdafx.h"
5. #include "windows.h"
6. /*
7. 效果：前面很快出五个，后面一秒出一个
8. */
9. //1、创建信号量
10. //CreateSemaphore
11. //2、等候信号量
12. //WaitForSingleObject
13. //WaitForMultipleObjects
14. //3、释放信号
15. //ReleaseSemaphore
16. //4、关闭信号量
17. //CloseHandle
18. HANDLE g_hSemaphore = NULL;
20. //输入1或者5发送1或者5个信号量
21. DWORD WINAPI ThreadSend3( LPVOID pParam )
22. {
23. while (true)
24. {
25. //3、释放信号
26. //ReleaseSemaphore
27. Sleep( 1000 );
28. CHAR ch = getchar( );
29. switch (ch)
30. {
31. case '1':
32. //释放信号
33. ReleaseSemaphore( g_hSemaphore, 1, NULL );
34. break;
35. case '5':
36. ReleaseSemaphore( g_hSemaphore, 5, NULL );
37. break;
38. }
39. }
40. return 0;
41. }
43. DWORD WINAPI ThreadSend( LPVOID pParam )
44. {
45. while (true)
46. {
47. //3、释放信号
48. //ReleaseSemaphore
49. ReleaseSemaphore( g_hSemaphore, 1, NULL );
50. Sleep( 1000 );
51. }
52. return 0;
53. }
55. DWORD WINAPI ThreadRecv( LPVOID pParam )
56. {
57. while (true)
58. {
59. WaitForSingleObject( g_hSemaphore, INFINITE );
60. printf( "Hello Semaphore\n" );
61. Sleep( 100 );
62. }
63. return 0;
64. }
65. void Create( )
66. {
67. DWORD nThreadID = 0;
68. HANDLE hThread[2] = { 0 };
70. hThread[0] = CreateThread( NULL, 0, ThreadSend, NULL, 0 ,&nThreadID);
71. hThread[1] = CreateThread( NULL, 0, ThreadRecv, NULL, 0 ,&nThreadID);
73. // 等候两个线程的结束
74. WaitForMultipleObjects( 2, hThread, TRUE, INFINITE );
75. }
76. int _tmain(int argc, _TCHAR* argv[])
77. {
79. //1、创建信号量
80. //CreateSemaphore
81. g_hSemaphore = CreateSemaphore( NULL, 5, 10, NULL );
82. Create( );
84. //4、关闭信号量
85. //CloseHandle
86. CloseHandle( g_hSemaphore );
87. return 0;
88. }

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转载于:https://www.cnblogs.com/nfking/p/5574191.html