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comparison src/thread/os2/SDL_sysmutex.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents d910939febfa
children 4da1ee79c9af
comparison
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1661:281d3f4870e5 1662:782fd950bd46
28 #include <os2.h> 28 #include <os2.h>
29 29
30 #include "SDL_mutex.h" 30 #include "SDL_mutex.h"
31 31
32 32
33 struct SDL_mutex { 33 struct SDL_mutex
34 HMTX hmtxID; 34 {
35 HMTX hmtxID;
35 }; 36 };
36 37
37 /* Create a mutex */ 38 /* Create a mutex */
38 DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void) 39 DECLSPEC SDL_mutex *SDLCALL
40 SDL_CreateMutex (void)
39 { 41 {
40 SDL_mutex *mutex; 42 SDL_mutex *mutex;
41 APIRET ulrc; 43 APIRET ulrc;
42 44
43 /* Allocate mutex memory */ 45 /* Allocate mutex memory */
44 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); 46 mutex = (SDL_mutex *) SDL_malloc (sizeof (*mutex));
45 if (mutex) 47 if (mutex) {
46 { 48 /* Create the mutex, with initial value signaled */
47 /* Create the mutex, with initial value signaled */ 49 ulrc = DosCreateMutexSem (NULL, // Create unnamed semaphore
48 ulrc = DosCreateMutexSem(NULL, // Create unnamed semaphore 50 &(mutex->hmtxID), // Pointer to handle
49 &(mutex->hmtxID), // Pointer to handle 51 0L, // Flags: create it private (not shared)
50 0L, // Flags: create it private (not shared) 52 FALSE); // Initial value: unowned
51 FALSE); // Initial value: unowned 53 if (ulrc != NO_ERROR) {
52 if (ulrc!=NO_ERROR) 54 SDL_SetError ("Couldn't create mutex");
53 { 55 SDL_free (mutex);
54 SDL_SetError("Couldn't create mutex"); 56 mutex = NULL;
55 SDL_free(mutex); 57 }
56 mutex = NULL; 58 } else {
59 SDL_OutOfMemory ();
57 } 60 }
58 } else { 61 return (mutex);
59 SDL_OutOfMemory();
60 }
61 return(mutex);
62 } 62 }
63 63
64 /* Free the mutex */ 64 /* Free the mutex */
65 DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex) 65 DECLSPEC void SDLCALL
66 SDL_DestroyMutex (SDL_mutex * mutex)
66 { 67 {
67 if ( mutex ) 68 if (mutex) {
68 { 69 if (mutex->hmtxID) {
69 if ( mutex->hmtxID ) 70 DosCloseMutexSem (mutex->hmtxID);
70 { 71 mutex->hmtxID = 0;
71 DosCloseMutexSem(mutex->hmtxID); 72 }
72 mutex->hmtxID = 0; 73 SDL_free (mutex);
73 } 74 }
74 SDL_free(mutex);
75 }
76 } 75 }
77 76
78 /* Lock the mutex */ 77 /* Lock the mutex */
79 DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex) 78 DECLSPEC int SDLCALL
79 SDL_mutexP (SDL_mutex * mutex)
80 { 80 {
81 if ( mutex == NULL ) 81 if (mutex == NULL) {
82 { 82 SDL_SetError ("Passed a NULL mutex");
83 SDL_SetError("Passed a NULL mutex"); 83 return -1;
84 return -1; 84 }
85 } 85 if (DosRequestMutexSem (mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR) {
86 if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR ) 86 SDL_SetError ("Couldn't wait on mutex");
87 { 87 return -1;
88 SDL_SetError("Couldn't wait on mutex"); 88 }
89 return -1; 89 return (0);
90 }
91 return(0);
92 } 90 }
93 91
94 /* Unlock the mutex */ 92 /* Unlock the mutex */
95 DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex) 93 DECLSPEC int SDLCALL
94 SDL_mutexV (SDL_mutex * mutex)
96 { 95 {
97 if ( mutex == NULL ) 96 if (mutex == NULL) {
98 { 97 SDL_SetError ("Passed a NULL mutex");
99 SDL_SetError("Passed a NULL mutex"); 98 return -1;
100 return -1; 99 }
101 } 100 if (DosReleaseMutexSem (mutex->hmtxID) != NO_ERROR) {
102 if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR ) 101 SDL_SetError ("Couldn't release mutex");
103 { 102 return -1;
104 SDL_SetError("Couldn't release mutex"); 103 }
105 return -1; 104 return (0);
106 }
107 return(0);
108 } 105 }
106
107 /* vi: set ts=4 sw=4 expandtab: */