Mercurial > sdl-ios-xcode
annotate include/SDL_mutex.h @ 1348:40d0975c1769
Date: Mon, 6 Feb 2006 11:41:04 -0500
From: "mystml@adinet.com.uy"
Subject: [SDL] ALT-F4 using DirectX
My game isn't getting SDL_QUIT when I press ALT-F4 using the DirectX
driver; it does get SDL_QUIT when I press the red X in the window.
I tracked this down to DX5_HandleMessage() in SDL_dx5events.c;
WM_SYSKEYDOWN is being trapped and ignored which causes Windows not to post
a WM_CLOSE, hence no SDL_QUIT is being generated.
The relevant code is this :
/* The keyboard is handled via DirectInput */
case WM_SYSKEYUP:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_KEYDOWN: {
/* Ignore windows keyboard messages */;
}
return(0);
If I comment the WM_SYSKEYDOWN case, it falls through DefWindowProc() and
ALT-F4 starts working again.
I'm not sure about the best way to fix this. One option is handling ALT-F4
as a particular case somehow, but doesn't sound good. Another option would
be to handle WM_SYSKEYDOWN separately and breaking instead of returning 0,
so processing falls through and goes to DefWindowProc which does The Right
Thing (TM). This seems to be the minimal change that makes ALT-F4 work and
normal keyboard input continues to work.
Does this sound reasonable? Am I overlooking anything? Do I submit a patch?
--Gabriel
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 08 Feb 2006 17:19:43 +0000 |
| parents | c9b51268668f |
| children | 67114343400d |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifndef _SDL_mutex_h | |
| 24 #define _SDL_mutex_h | |
| 25 | |
| 26 /* Functions to provide thread synchronization primitives | |
| 27 | |
| 28 These are independent of the other SDL routines. | |
| 29 */ | |
| 30 | |
| 31 #include "SDL_main.h" | |
| 32 #include "SDL_types.h" | |
| 33 | |
| 34 #include "begin_code.h" | |
| 35 /* Set up for C function definitions, even when using C++ */ | |
| 36 #ifdef __cplusplus | |
| 37 extern "C" { | |
| 38 #endif | |
| 39 | |
| 40 /* Synchronization functions which can time out return this value | |
| 41 if they time out. | |
| 42 */ | |
| 43 #define SDL_MUTEX_TIMEDOUT 1 | |
| 44 | |
| 45 /* This is the timeout value which corresponds to never time out */ | |
| 46 #define SDL_MUTEX_MAXWAIT (~(Uint32)0) | |
| 47 | |
| 48 | |
| 49 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 50 /* Mutex functions */ | |
| 51 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 52 | |
| 53 /* The SDL mutex structure, defined in SDL_mutex.c */ | |
| 54 struct SDL_mutex; | |
| 55 typedef struct SDL_mutex SDL_mutex; | |
| 56 | |
| 57 /* Create a mutex, initialized unlocked */ | |
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58 extern DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void); |
| 0 | 59 |
| 60 /* Lock the mutex (Returns 0, or -1 on error) */ | |
| 61 #define SDL_LockMutex(m) SDL_mutexP(m) | |
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62 extern DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex); |
| 0 | 63 |
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64 /* Unlock the mutex (Returns 0, or -1 on error) |
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65 It is an error to unlock a mutex that has not been locked by |
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66 the current thread, and doing so results in undefined behavior. |
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67 */ |
| 0 | 68 #define SDL_UnlockMutex(m) SDL_mutexV(m) |
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69 extern DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex); |
| 0 | 70 |
| 71 /* Destroy a mutex */ | |
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72 extern DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex); |
| 0 | 73 |
| 74 | |
| 75 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 76 /* Semaphore functions */ | |
| 77 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 78 | |
| 79 /* The SDL semaphore structure, defined in SDL_sem.c */ | |
| 80 struct SDL_semaphore; | |
| 81 typedef struct SDL_semaphore SDL_sem; | |
| 82 | |
| 83 /* Create a semaphore, initialized with value, returns NULL on failure. */ | |
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84 extern DECLSPEC SDL_sem * SDLCALL SDL_CreateSemaphore(Uint32 initial_value); |
| 0 | 85 |
| 86 /* Destroy a semaphore */ | |
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87 extern DECLSPEC void SDLCALL SDL_DestroySemaphore(SDL_sem *sem); |
| 0 | 88 |
| 89 /* This function suspends the calling thread until the semaphore pointed | |
| 90 * to by sem has a positive count. It then atomically decreases the semaphore | |
| 91 * count. | |
| 92 */ | |
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93 extern DECLSPEC int SDLCALL SDL_SemWait(SDL_sem *sem); |
| 0 | 94 |
| 95 /* Non-blocking variant of SDL_SemWait(), returns 0 if the wait succeeds, | |
| 96 SDL_MUTEX_TIMEDOUT if the wait would block, and -1 on error. | |
| 97 */ | |
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98 extern DECLSPEC int SDLCALL SDL_SemTryWait(SDL_sem *sem); |
| 0 | 99 |
| 100 /* Variant of SDL_SemWait() with a timeout in milliseconds, returns 0 if | |
| 101 the wait succeeds, SDL_MUTEX_TIMEDOUT if the wait does not succeed in | |
| 102 the allotted time, and -1 on error. | |
| 103 On some platforms this function is implemented by looping with a delay | |
| 104 of 1 ms, and so should be avoided if possible. | |
| 105 */ | |
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106 extern DECLSPEC int SDLCALL SDL_SemWaitTimeout(SDL_sem *sem, Uint32 ms); |
| 0 | 107 |
| 108 /* Atomically increases the semaphore's count (not blocking), returns 0, | |
| 109 or -1 on error. | |
| 110 */ | |
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111 extern DECLSPEC int SDLCALL SDL_SemPost(SDL_sem *sem); |
| 0 | 112 |
| 113 /* Returns the current count of the semaphore */ | |
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114 extern DECLSPEC Uint32 SDLCALL SDL_SemValue(SDL_sem *sem); |
| 0 | 115 |
| 116 | |
| 117 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 118 /* Condition variable functions */ | |
| 119 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ | |
| 120 | |
| 121 /* The SDL condition variable structure, defined in SDL_cond.c */ | |
| 122 struct SDL_cond; | |
| 123 typedef struct SDL_cond SDL_cond; | |
| 124 | |
| 125 /* Create a condition variable */ | |
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126 extern DECLSPEC SDL_cond * SDLCALL SDL_CreateCond(void); |
| 0 | 127 |
| 128 /* Destroy a condition variable */ | |
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129 extern DECLSPEC void SDLCALL SDL_DestroyCond(SDL_cond *cond); |
| 0 | 130 |
| 131 /* Restart one of the threads that are waiting on the condition variable, | |
| 132 returns 0 or -1 on error. | |
| 133 */ | |
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134 extern DECLSPEC int SDLCALL SDL_CondSignal(SDL_cond *cond); |
| 0 | 135 |
| 136 /* Restart all threads that are waiting on the condition variable, | |
| 137 returns 0 or -1 on error. | |
| 138 */ | |
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139 extern DECLSPEC int SDLCALL SDL_CondBroadcast(SDL_cond *cond); |
| 0 | 140 |
| 141 /* Wait on the condition variable, unlocking the provided mutex. | |
| 142 The mutex must be locked before entering this function! | |
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143 The mutex is re-locked once the condition variable is signaled. |
| 0 | 144 Returns 0 when it is signaled, or -1 on error. |
| 145 */ | |
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146 extern DECLSPEC int SDLCALL SDL_CondWait(SDL_cond *cond, SDL_mutex *mut); |
| 0 | 147 |
| 148 /* Waits for at most 'ms' milliseconds, and returns 0 if the condition | |
| 149 variable is signaled, SDL_MUTEX_TIMEDOUT if the condition is not | |
| 150 signaled in the allotted time, and -1 on error. | |
| 151 On some platforms this function is implemented by looping with a delay | |
| 152 of 1 ms, and so should be avoided if possible. | |
| 153 */ | |
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154 extern DECLSPEC int SDLCALL SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms); |
| 0 | 155 |
| 156 /* Ends C function definitions when using C++ */ | |
| 157 #ifdef __cplusplus | |
| 158 } | |
| 159 #endif | |
| 160 #include "close_code.h" | |
| 161 | |
| 162 #endif /* _SDL_mutex_h */ |