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comparison src/thread/amigaos/SDL_syssem.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
equal deleted inserted replaced
1661:281d3f4870e5 1662:782fd950bd46
27 #include "SDL_systhread_c.h" 27 #include "SDL_systhread_c.h"
28 28
29 29
30 struct SDL_semaphore 30 struct SDL_semaphore
31 { 31 {
32 struct SignalSemaphore Sem; 32 struct SignalSemaphore Sem;
33 }; 33 };
34 34
35 #undef D 35 #undef D
36 36
37 #define D(x) 37 #define D(x)
38 38
39 SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) 39 SDL_sem *
40 SDL_CreateSemaphore (Uint32 initial_value)
40 { 41 {
41 SDL_sem *sem; 42 SDL_sem *sem;
42 43
43 sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); 44 sem = (SDL_sem *) SDL_malloc (sizeof (*sem));
44 45
45 if ( ! sem ) { 46 if (!sem) {
46 SDL_OutOfMemory(); 47 SDL_OutOfMemory ();
47 return(0); 48 return (0);
48 } 49 }
49 50
50 D(bug("Creating semaphore %lx...\n",sem)); 51 D (bug ("Creating semaphore %lx...\n", sem));
51 52
52 SDL_memset(sem,0,sizeof(*sem)); 53 SDL_memset (sem, 0, sizeof (*sem));
53 54
54 InitSemaphore(&sem->Sem); 55 InitSemaphore (&sem->Sem);
55 56
56 return(sem); 57 return (sem);
57 } 58 }
58 59
59 void SDL_DestroySemaphore(SDL_sem *sem) 60 void
61 SDL_DestroySemaphore (SDL_sem * sem)
60 { 62 {
61 D(bug("Destroying semaphore %lx...\n",sem)); 63 D (bug ("Destroying semaphore %lx...\n", sem));
62 64
63 if ( sem ) { 65 if (sem) {
64 // Condizioni per liberare i task in attesa? 66 // Condizioni per liberare i task in attesa?
65 SDL_free(sem); 67 SDL_free (sem);
66 } 68 }
67 } 69 }
68 70
69 int SDL_SemTryWait(SDL_sem *sem) 71 int
72 SDL_SemTryWait (SDL_sem * sem)
70 { 73 {
71 if ( ! sem ) { 74 if (!sem) {
72 SDL_SetError("Passed a NULL semaphore"); 75 SDL_SetError ("Passed a NULL semaphore");
73 return -1; 76 return -1;
74 } 77 }
75 78
76 D(bug("TryWait semaphore...%lx\n",sem)); 79 D (bug ("TryWait semaphore...%lx\n", sem));
77 80
78 ObtainSemaphore(&sem->Sem); 81 ObtainSemaphore (&sem->Sem);
79 // ReleaseSemaphore(&sem->Sem); 82 // ReleaseSemaphore(&sem->Sem);
80 83
81 return 1; 84 return 1;
82 } 85 }
83 86
84 int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) 87 int
88 SDL_SemWaitTimeout (SDL_sem * sem, Uint32 timeout)
85 { 89 {
86 int retval; 90 int retval;
87 91
88 92
89 if ( ! sem ) { 93 if (!sem) {
90 SDL_SetError("Passed a NULL semaphore"); 94 SDL_SetError ("Passed a NULL semaphore");
91 return -1; 95 return -1;
92 } 96 }
93 97
94 D(bug("WaitTimeout (%ld) semaphore...%lx\n",timeout,sem)); 98 D (bug ("WaitTimeout (%ld) semaphore...%lx\n", timeout, sem));
95 99
96 /* A timeout of 0 is an easy case */ 100 /* A timeout of 0 is an easy case */
97 if ( timeout == 0 ) { 101 if (timeout == 0) {
98 ObtainSemaphore(&sem->Sem); 102 ObtainSemaphore (&sem->Sem);
99 return 1; 103 return 1;
100 } 104 }
101 if(!(retval=AttemptSemaphore(&sem->Sem))) 105 if (!(retval = AttemptSemaphore (&sem->Sem))) {
102 { 106 SDL_Delay (timeout);
103 SDL_Delay(timeout); 107 retval = AttemptSemaphore (&sem->Sem);
104 retval=AttemptSemaphore(&sem->Sem); 108 }
105 }
106 109
107 if(retval==TRUE) 110 if (retval == TRUE) {
108 { 111 // ReleaseSemaphore(&sem->Sem);
109 // ReleaseSemaphore(&sem->Sem); 112 retval = 1;
110 retval=1; 113 }
111 }
112 114
113 return retval; 115 return retval;
114 } 116 }
115 117
116 int SDL_SemWait(SDL_sem *sem) 118 int
119 SDL_SemWait (SDL_sem * sem)
117 { 120 {
118 ObtainSemaphore(&sem->Sem); 121 ObtainSemaphore (&sem->Sem);
119 return 0; 122 return 0;
120 } 123 }
121 124
122 Uint32 SDL_SemValue(SDL_sem *sem) 125 Uint32
126 SDL_SemValue (SDL_sem * sem)
123 { 127 {
124 Uint32 value; 128 Uint32 value;
125 129
126 value = 0; 130 value = 0;
127 if ( sem ) { 131 if (sem) {
128 #ifdef STORMC4_WOS 132 #ifdef STORMC4_WOS
129 value = sem->Sem.ssppc_SS.ss_NestCount; 133 value = sem->Sem.ssppc_SS.ss_NestCount;
130 #else 134 #else
131 value = sem->Sem.ss_NestCount; 135 value = sem->Sem.ss_NestCount;
132 #endif 136 #endif
133 } 137 }
134 return value; 138 return value;
135 } 139 }
136 140
137 int SDL_SemPost(SDL_sem *sem) 141 int
142 SDL_SemPost (SDL_sem * sem)
138 { 143 {
139 if ( ! sem ) { 144 if (!sem) {
140 SDL_SetError("Passed a NULL semaphore"); 145 SDL_SetError ("Passed a NULL semaphore");
141 return -1; 146 return -1;
142 } 147 }
143 D(bug("SemPost semaphore...%lx\n",sem)); 148 D (bug ("SemPost semaphore...%lx\n", sem));
144 149
145 ReleaseSemaphore(&sem->Sem); 150 ReleaseSemaphore (&sem->Sem);
146 return 0; 151 return 0;
147 } 152 }
148 153
154 /* vi: set ts=4 sw=4 expandtab: */