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 Library General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2 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 Library General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Library General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@devolution.com 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_syssem.cpp 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Epoc version by Markus Mertama (w@iki.fi) 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef SAVE_RCSID 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic char rcsid = 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall "@(#) $Id: SDL_syssem.c,v 1.1.2.4 2000/06/22 15:24:48 hercules Exp $"; 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Semaphore functions using the Win32 API */ 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall//#include <stdio.h> 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall//#include <stdlib.h> 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <e32std.h> 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_error.h" 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_thread.h" 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define SDL_MUTEX_TIMEOUT -2 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstruct SDL_semaphore 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt handle; 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt count; 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }; 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallextern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*); 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef EKA2 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallextern TInt NewThread(const TDesC& aName, TAny* aPtr1, TAny* aPtr2); 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallTInt NewSema(const TDesC& aName, TAny* aPtr1, TAny* aPtr2) 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt value = *((TInt*) aPtr2); 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return ((RSemaphore*)aPtr1)->CreateGlobal(aName, value); 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Create a semaphore */ 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallSDL_sem *SDL_CreateSemaphore(Uint32 initial_value) 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore s; 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt status = CreateUnique(NewSema, &s, &initial_value); 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if(status != KErrNone) 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Couldn't create semaphore"); 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_semaphore* sem = new /*(ELeave)*/ SDL_semaphore; 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sem->handle = s.Handle(); 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sem->count = initial_value; 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(sem); 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Free the semaphore */ 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallvoid SDL_DestroySemaphore(SDL_sem *sem) 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( sem ) 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore sema; 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.SetHandle(sem->handle); 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while(--sem->count) 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Signal(); 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Close(); 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall delete sem; 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sem = NULL; 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef EKA2 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall struct TInfo 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInfo(TInt aTime, TInt aHandle) : 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall iTime(aTime), iHandle(aHandle), iVal(0) {} 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt iTime; 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt iHandle; 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt iVal; 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }; 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallTBool ThreadRun(TAny* aInfo) 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInfo* info = STATIC_CAST(TInfo*, aInfo); 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall User::After(info->iTime); 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore sema; 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.SetHandle(info->iHandle); 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Signal(); 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall info->iVal = SDL_MUTEX_TIMEOUT; 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallvoid _WaitAll(SDL_sem *sem) 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall //since SemTryWait may changed the counter. 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall //this may not be atomic, but hopes it works. 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore sema; 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.SetHandle(sem->handle); 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Wait(); 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while(sem->count < 0) 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Wait(); 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! sem ) { 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Passed a NULL sem"); 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( timeout == SDL_MUTEX_MAXWAIT ) 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall _WaitAll(sem); 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return SDL_MUTEX_MAXWAIT; 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef EKA2 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore sema; 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.SetHandle(sem->handle); 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if(KErrNone == sema.Wait(timeout)) 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RThread thread; 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInfo* info = new (ELeave)TInfo(timeout, sem->handle); 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall TInt status = CreateUnique(NewThread, &thread, info); 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if(status != KErrNone) 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return status; 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall thread.Resume(); 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall _WaitAll(sem); 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if(thread.ExitType() == EExitPending) 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall thread.Kill(SDL_MUTEX_TIMEOUT); 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall thread.Close(); 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return info->iVal; 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_SemTryWait(SDL_sem *sem) 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if(sem->count > 0) 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sem->count--; 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return SDL_MUTEX_TIMEOUT; 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_SemWait(SDL_sem *sem) 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Returns the current count of the semaphore */ 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallUint32 SDL_SemValue(SDL_sem *sem) 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! sem ) { 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Passed a NULL sem"); 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return sem->count; 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_SemPost(SDL_sem *sem) 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! sem ) { 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Passed a NULL sem"); 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sem->count++; 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall RSemaphore sema; 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.SetHandle(sem->handle); 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sema.Signal(); 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 215