19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Lesser General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2.1 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Lesser General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Lesser General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free Software 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Mutex functions using the Win32 API */ 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define WIN32_LEAN_AND_MEAN 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <windows.h> 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_mutex.h" 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstruct SDL_mutex { 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall HANDLE id; 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Create a mutex */ 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallSDL_mutex *SDL_CreateMutex(void) 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_mutex *mutex; 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Allocate mutex memory */ 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mutex ) { 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Create the mutex, with initial value signaled */ 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mutex->id = CreateMutex(NULL, FALSE, NULL); 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! mutex->id ) { 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Couldn't create mutex"); 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(mutex); 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mutex = NULL; 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_OutOfMemory(); 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(mutex); 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Free the mutex */ 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallvoid SDL_DestroyMutex(SDL_mutex *mutex) 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mutex ) { 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mutex->id ) { 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall CloseHandle(mutex->id); 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mutex->id = 0; 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(mutex); 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Lock the mutex */ 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_mutexP(SDL_mutex *mutex) 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mutex == NULL ) { 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Passed a NULL mutex"); 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED ) { 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Couldn't wait on mutex"); 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(0); 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Unlock the mutex */ 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_mutexV(SDL_mutex *mutex) 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mutex == NULL ) { 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Passed a NULL mutex"); 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ReleaseMutex(mutex->id) == FALSE ) { 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Couldn't release mutex"); 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(0); 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 96