1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 /*
24 SDL_sysmutex.cpp
25
26 Epoc version by Markus Mertama (w@iki.fi)
27 */
28
29
30 #ifdef SAVE_RCSID
31 static char rcsid =
32 "@(#) $Id: SDL_sysmutex.c,v 1.1.2.3 2000/06/22 15:25:23 hercules Exp $";
33 #endif
34
35 /* Mutex functions using the Win32 API */
36
37 //#include <stdio.h>
38 //#include <stdlib.h>
39
40 #include <e32std.h>
41
42 #include "epoc_sdl.h"
43
44 #include "SDL_error.h"
45 #include "SDL_mutex.h"
46
47
48 #ifdef EKA2 //???
49 struct SDL_mutex
50 {
51 TInt handle;
52 };
53 #else
54 struct _SDL_mutex
55 {
56 TInt handle;
57 };
58 #endif
59
60 extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);
61
NewMutex(const TDesC & aName,TAny * aPtr1,TAny *)62 TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)
63 {
64 return ((RMutex*)aPtr1)->CreateGlobal(aName);
65 }
66
DeleteMutex(TAny * aMutex)67 void DeleteMutex(TAny* aMutex)
68 {
69 SDL_DestroyMutex ((SDL_mutex*) aMutex);
70 }
71
72 /* Create a mutex */
SDL_CreateMutex(void)73 SDL_mutex *SDL_CreateMutex(void)
74 {
75 RMutex rmutex;
76
77 TInt status = CreateUnique(NewMutex, &rmutex, NULL);
78 if(status != KErrNone)
79 {
80 SDL_SetError("Couldn't create mutex");
81 }
82 SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;
83 mutex->handle = rmutex.Handle();
84 EpocSdlEnv::AppendCleanupItem(TSdlCleanupItem(DeleteMutex, mutex));
85 return(mutex);
86 }
87
88 /* Free the mutex */
SDL_DestroyMutex(SDL_mutex * mutex)89 void SDL_DestroyMutex(SDL_mutex *mutex)
90 {
91 if ( mutex )
92 {
93 RMutex rmutex;
94 rmutex.SetHandle(mutex->handle);
95 if(rmutex.IsHeld())
96 {
97 rmutex.Signal();
98 }
99 rmutex.Close();
100 EpocSdlEnv::RemoveCleanupItem(mutex);
101 delete(mutex);
102 mutex = NULL;
103 }
104 }
105
106 /* Lock the mutex */
SDL_mutexP(SDL_mutex * mutex)107 int SDL_mutexP(SDL_mutex *mutex)
108 {
109 if ( mutex == NULL ) {
110 SDL_SetError("Passed a NULL mutex");
111 return -1;
112 }
113 RMutex rmutex;
114 rmutex.SetHandle(mutex->handle);
115 rmutex.Wait();
116 return(0);
117 }
118
119 /* Unlock the mutex */
SDL_mutexV(SDL_mutex * mutex)120 int SDL_mutexV(SDL_mutex *mutex)
121 {
122 if ( mutex == NULL ) {
123 SDL_SetError("Passed a NULL mutex");
124 return -1;
125 }
126 RMutex rmutex;
127 rmutex.SetHandle(mutex->handle);
128 rmutex.Signal();
129 return(0);
130 }
131