Mercurial > dwindows
comparison win/dw.c @ 1158:f86f556ff29d
Added dw_mutex_trylock() that functions like dw_mutex_lock() except
it does not block if the mutex is already locked, it instead returns
DW_MUTEX_TIMEOUT. Allowing threads to continue to do work while
waiting to obtain a mutex.
| author | bsmith@81767d24-ef19-dc11-ae90-00e081727c95 |
|---|---|
| date | Thu, 15 Sep 2011 21:13:59 +0000 |
| parents | e6a2f57c0842 |
| children | 924c8087a755 |
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| 1157:79bd0aff0bc2 | 1158:f86f556ff29d |
|---|---|
| 9203 else | 9203 else |
| 9204 WaitForSingleObject((HANDLE)mutex, INFINITE); | 9204 WaitForSingleObject((HANDLE)mutex, INFINITE); |
| 9205 } | 9205 } |
| 9206 | 9206 |
| 9207 /* | 9207 /* |
| 9208 * Tries to gain access to the semaphore. | |
| 9209 * Parameters: | |
| 9210 * mutex: The handle to the mutex returned by dw_mutex_new(). | |
| 9211 * Returns: | |
| 9212 * DW_ERROR_NONE on success, DW_ERROR_TIMEOUT if it is already locked. | |
| 9213 */ | |
| 9214 int API dw_mutex_trylock(HMTX mutex) | |
| 9215 { | |
| 9216 if(WaitForSingleObject((HANDLE)mutex, 0) == WAIT_OBJECT_0) | |
| 9217 return DW_ERROR_NONE; | |
| 9218 return DW_ERROR_TIMEOUT; | |
| 9219 } | |
| 9220 | |
| 9221 /* | |
| 9208 * Reliquishes the access to the semaphore. | 9222 * Reliquishes the access to the semaphore. |
| 9209 * Parameters: | 9223 * Parameters: |
| 9210 * mutex: The handle to the mutex returned by dw_mutex_new(). | 9224 * mutex: The handle to the mutex returned by dw_mutex_new(). |
| 9211 */ | 9225 */ |
| 9212 void API dw_mutex_unlock(HMTX mutex) | 9226 void API dw_mutex_unlock(HMTX mutex) |