1 | /* -*- mode: C; tab-width:8; c-basic-offset:8 -*- |
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2 | * vi:set ts=8: |
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3 | * |
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4 | * mutexlib.h |
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5 | * |
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6 | * Include that sorts out which mutex library we're using. |
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7 | */ |
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8 | #ifndef MUTEXLIB_H_ |
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9 | #define MUTEXLIB_H_ |
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10 | |
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11 | #include "al_siteconfig.h" |
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12 | |
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13 | #if defined(USE_EMPTY_LOCKS) |
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14 | |
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15 | #define _alCreateMutex() |
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16 | #define _alDestroyMutex(m) |
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17 | #define _alLockMutex(m) |
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18 | #define _alTryLockMutex(m) |
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19 | #define _alUnlockMutex(m) |
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20 | |
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21 | #else |
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22 | |
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23 | #if defined(USE_POSIXTHREADING) |
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24 | |
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25 | #include <pthread.h> |
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26 | typedef pthread_mutex_t *MutexID; |
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27 | |
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28 | #elif defined(USE_WINDOWSTHREADING) |
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29 | |
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30 | #include <windows.h> |
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31 | typedef LPCRITICAL_SECTION MutexID; |
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32 | |
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33 | #elif defined(USE_MORPHOSTHREADING) |
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34 | |
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35 | #include <exec/semaphores.h> |
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36 | typedef struct SignalSemaphore *MutexID; |
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37 | |
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38 | #else |
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39 | |
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40 | #error "No mutex package" |
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41 | |
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42 | #endif |
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43 | |
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44 | /* Creates a new mutex. Returns NULL on error. */ |
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45 | extern MutexID _alCreateMutex( void ); |
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46 | |
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47 | /* Destroys the given mutex, which must be unlocked. */ |
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48 | extern void _alDestroyMutex( MutexID mutex ); |
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49 | |
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50 | /* Locks the given mutex, blocking if it is already locked. */ |
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51 | extern void _alLockMutex( MutexID mutex ); |
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52 | |
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53 | /* Try to lock the given mutex, returning zero if it succeeded, non-zero |
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54 | otherwise. Non-blocking. */ |
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55 | extern int _alTryLockMutex( MutexID mutex ); |
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56 | |
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57 | /* Unlocks the given mutex, which must be locked by the same thread. */ |
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58 | extern void _alUnlockMutex( MutexID mutex ); |
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59 | |
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60 | #endif /* USE_EMPTY_LOCKS */ |
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61 | |
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62 | #endif /* MUTEXLIB_H_ */ |
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