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annotate src/thread/win32/SDL_sysmutex.c @ 2842:97ba0be8b565

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Date: Sat, 06 Dec 2008 15:27:00 +0100 From: Couriersud Subject: SDL: Relative mouse movements The patch below will reenable processing of relative mouse movements. The DirectFB drivers generates those in "grabbed" mode. These ensure, that even in fullscreen mode relative movements are reported. SDLMAME depends on this for games with trackballs. Looking at the code I ask myself whether relative movements should be handled in the drivers (x11, directfb). Both x11 and directfb are able to report relative movements. This would leave it to the driver to use the most appropriate method for relative movements when at the border of a fullscreen window or being "grabbed".
author Sam Lantinga <slouken@libsdl.org>
date Sat, 06 Dec 2008 17:50:50 +0000
parents c121d94672cb
children 99210400e8b9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* Mutex functions using the Win32 API */
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25
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26 #define WIN32_LEAN_AND_MEAN
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27 #include <windows.h>
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28
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29 #include "SDL_mutex.h"
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30
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31
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32 struct SDL_mutex
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33 {
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34 HANDLE id;
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35 };
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36
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37 /* Create a mutex */
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38 SDL_mutex *
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39 SDL_CreateMutex(void)
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40 {
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41 SDL_mutex *mutex;
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42
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43 /* Allocate mutex memory */
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44 mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
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45 if (mutex) {
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46 /* Create the mutex, with initial value signaled */
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47 mutex->id = CreateMutex(NULL, FALSE, NULL);
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48 if (!mutex->id) {
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49 SDL_SetError("Couldn't create mutex");
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50 SDL_free(mutex);
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51 mutex = NULL;
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52 }
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53 } else {
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54 SDL_OutOfMemory();
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55 }
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56 return (mutex);
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57 }
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58
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59 /* Free the mutex */
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60 void
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61 SDL_DestroyMutex(SDL_mutex * mutex)
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62 {
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63 if (mutex) {
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64 if (mutex->id) {
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65 CloseHandle(mutex->id);
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66 mutex->id = 0;
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67 }
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68 SDL_free(mutex);
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69 }
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70 }
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71
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72 /* Lock the mutex */
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73 int
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74 SDL_mutexP(SDL_mutex * mutex)
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75 {
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76 if (mutex == NULL) {
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77 SDL_SetError("Passed a NULL mutex");
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78 return -1;
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79 }
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80 if (WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED) {
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81 SDL_SetError("Couldn't wait on mutex");
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82 return -1;
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83 }
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84 return (0);
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85 }
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86
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87 /* Unlock the mutex */
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88 int
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89 SDL_mutexV(SDL_mutex * mutex)
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90 {
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91 if (mutex == NULL) {
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92 SDL_SetError("Passed a NULL mutex");
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93 return -1;
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94 }
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95 if (ReleaseMutex(mutex->id) == FALSE) {
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96 SDL_SetError("Couldn't release mutex");
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97 return -1;
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98 }
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99 return (0);
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100 }
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101
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102 /* vi: set ts=4 sw=4 expandtab: */