Mutex: Difference between revisions
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Some explanation of Ada implementation |
→{{header|C}}: posix mutex |
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It is also possible to implement mutex as a monitor task. |
It is also possible to implement mutex as a monitor task. |
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=={{header|C}}== |
=={{header|C}}== |
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===Win32=== |
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{{works with|Win32}} |
{{works with|Win32}} |
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To create a mutex operating system "object": |
To create a mutex operating system "object": |
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< |
<c> |
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HANDLE hMutex = CreateMutex(NULL, FALSE, NULL); |
HANDLE hMutex = CreateMutex(NULL, FALSE, NULL); |
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</ |
</c> |
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To lock the mutex: |
To lock the mutex: |
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< |
<c> |
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WaitForSingleObject(hMutex, INFINITE); |
WaitForSingleObject(hMutex, INFINITE); |
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</ |
</c> |
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To unlock the mutex |
To unlock the mutex |
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< |
<c> |
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ReleaseMutex(hMutex); |
ReleaseMutex(hMutex); |
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</ |
</c> |
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When the program is finished with the mutex: |
When the program is finished with the mutex: |
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< |
<c> |
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CloseHandle(hMutex); |
CloseHandle(hMutex); |
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</ |
</c> |
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===POSIX=== |
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{{works with|POSIX}} |
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Creating a mutex: |
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<c>#include <pthread.h> |
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;</c> |
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Locking: |
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<c>pthread_mutex_lock(&mutex);</c> |
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Unlocking: |
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<c>pthread_mutex_unlock(&mutex);</c> |
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=={{header|C++}}== |
=={{header|C++}}== |
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{{works with|Win32}} |
{{works with|Win32}} |
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