mirror of
https://git.rip/DMCA_FUCKER/re3.git
synced 2024-11-18 08:37:46 +00:00
524 lines
11 KiB
C++
524 lines
11 KiB
C++
#ifndef _WIN32
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#include "common.h"
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#include "crossplatform.h"
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#include <pthread.h>
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#include <signal.h>
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#include <semaphore.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/statvfs.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/resource.h>
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#include <sys/syscall.h>
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#include "CdStream.h"
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#include "rwcore.h"
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#include "RwHelper.h"
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#define CDDEBUG(f, ...) debug ("%s: " f "\n", "cdvd_stream", ## __VA_ARGS__)
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#define CDTRACE(f, ...) printf("%s: " f "\n", "cdvd_stream", ## __VA_ARGS__)
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// #define ONE_THREAD_PER_CHANNEL // Don't use if you're not on SSD/Flash. (Also you may want to benefit from this via using all channels in Streaming.cpp)
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bool flushStream[MAX_CDCHANNELS];
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struct CdReadInfo
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{
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uint32 nSectorOffset;
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uint32 nSectorsToRead;
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void *pBuffer;
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bool bLocked;
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bool bReading;
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int32 nStatus;
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#ifdef ONE_THREAD_PER_CHANNEL
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int8 nThreadStatus; // 0: created 1:initalized 2:abort now
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pthread_t pChannelThread;
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sem_t pStartSemaphore;
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#endif
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sem_t pDoneSemaphore; // used for CdStreamSync
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int32 hFile;
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};
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char gCdImageNames[MAX_CDIMAGES+1][64];
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int32 gNumImages;
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int32 gNumChannels;
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int32 gImgFiles[MAX_CDIMAGES]; // -1: error 0:unused otherwise: fd
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char *gImgNames[MAX_CDIMAGES];
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#ifndef ONE_THREAD_PER_CHANNEL
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pthread_t _gCdStreamThread;
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sem_t gCdStreamSema; // released when we have new thing to read(so channel is set)
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int8 gCdStreamThreadStatus; // 0: created 1:initalized 2:abort now
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Queue gChannelRequestQ;
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bool _gbCdStreamOverlapped;
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#endif
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CdReadInfo *gpReadInfo;
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int32 lastPosnRead;
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int _gdwCdStreamFlags;
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void *CdStreamThread(void* channelId);
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void
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CdStreamInitThread(void)
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{
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int status;
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#ifndef ONE_THREAD_PER_CHANNEL
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gChannelRequestQ.items = (int32 *)calloc(gNumChannels + 1, sizeof(int32));
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gChannelRequestQ.head = 0;
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gChannelRequestQ.tail = 0;
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gChannelRequestQ.size = gNumChannels + 1;
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ASSERT(gChannelRequestQ.items != nil );
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status = sem_init(&gCdStreamSema, 0, 0);
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#endif
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if (status == -1) {
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CDTRACE("failed to create stream semaphore");
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ASSERT(0);
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return;
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}
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if ( gNumChannels > 0 )
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{
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for ( int32 i = 0; i < gNumChannels; i++ )
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{
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status = sem_init(&gpReadInfo[i].pDoneSemaphore, 0, 0);
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if (status == -1)
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{
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CDTRACE("failed to create sync semaphore");
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ASSERT(0);
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return;
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}
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#ifdef ONE_THREAD_PER_CHANNEL
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status = sem_init(&gpReadInfo[i].pStartSemaphore, 0, 0);
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if (status == -1)
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{
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CDTRACE("failed to create start semaphore");
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ASSERT(0);
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return;
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}
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gpReadInfo[i].nThreadStatus = 0;
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int *channelI = (int*)malloc(sizeof(int));
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*channelI = i;
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status = pthread_create(&gpReadInfo[i].pChannelThread, NULL, CdStreamThread, (void*)channelI);
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if (status == -1)
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{
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CDTRACE("failed to create sync thread");
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ASSERT(0);
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return;
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}
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#endif
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}
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}
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#ifndef ONE_THREAD_PER_CHANNEL
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debug("Using one streaming thread for all channels\n");
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status = pthread_create(&_gCdStreamThread, NULL, CdStreamThread, nil);
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gCdStreamThreadStatus = 0;
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if (status == -1)
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{
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CDTRACE("failed to create sync thread");
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ASSERT(0);
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return;
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}
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#else
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debug("Using seperate streaming threads for each channel\n");
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#endif
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}
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void
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CdStreamInit(int32 numChannels)
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{
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struct statvfs fsInfo;
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if((statvfs("models/gta3.img", &fsInfo)) < 0)
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{
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CDTRACE("can't get filesystem info");
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ASSERT(0);
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return;
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}
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#ifdef __linux__
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_gdwCdStreamFlags = O_RDONLY | O_NOATIME;
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#else
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_gdwCdStreamFlags = O_RDONLY;
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#endif
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// People say it's slower
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/*
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if ( fsInfo.f_bsize <= CDSTREAM_SECTOR_SIZE )
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{
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_gdwCdStreamFlags |= O_DIRECT;
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debug("Using no buffered loading for streaming\n");
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}
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*/
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void *pBuffer = (void *)RwMallocAlign(CDSTREAM_SECTOR_SIZE, fsInfo.f_bsize);
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ASSERT( pBuffer != nil );
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gNumImages = 0;
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gNumChannels = numChannels;
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gpReadInfo = (CdReadInfo *)calloc(numChannels, sizeof(CdReadInfo));
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ASSERT( gpReadInfo != nil );
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CDDEBUG("read info %p", gpReadInfo);
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CdStreamInitThread();
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ASSERT( pBuffer != nil );
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RwFreeAlign(pBuffer);
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}
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uint32
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GetGTA3ImgSize(void)
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{
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ASSERT( gImgFiles[0] > 0 );
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struct stat statbuf;
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char path[PATH_MAX];
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realpath(gImgNames[0], path);
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if (stat(path, &statbuf) == -1) {
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// Try case-insensitivity
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char* real = casepath(gImgNames[0], false);
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if (real)
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{
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realpath(real, path);
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free(real);
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if (stat(path, &statbuf) != -1)
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goto ok;
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}
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CDTRACE("can't get size of gta3.img");
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ASSERT(0);
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return 0;
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}
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ok:
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return statbuf.st_size;
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}
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void
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CdStreamShutdown(void)
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{
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// Destroying semaphores and free(gpReadInfo) will be done at threads
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#ifndef ONE_THREAD_PER_CHANNEL
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gCdStreamThreadStatus = 2;
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sem_post(&gCdStreamSema);
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#endif
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#ifdef ONE_THREAD_PER_CHANNEL
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for ( int32 i = 0; i < gNumChannels; i++ ) {
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gpReadInfo[i].nThreadStatus = 2;
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sem_post(&gpReadInfo[i].pStartSemaphore);
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}
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#endif
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}
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int32
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CdStreamRead(int32 channel, void *buffer, uint32 offset, uint32 size)
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{
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ASSERT( channel < gNumChannels );
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ASSERT( buffer != nil );
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lastPosnRead = size + offset;
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ASSERT( _GET_INDEX(offset) < MAX_CDIMAGES );
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int32 hImage = gImgFiles[_GET_INDEX(offset)];
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ASSERT( hImage > 0 );
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CdReadInfo *pChannel = &gpReadInfo[channel];
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ASSERT( pChannel != nil );
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pChannel->hFile = hImage - 1;
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if ( pChannel->nSectorsToRead != 0 || pChannel->bReading )
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return STREAM_NONE;
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pChannel->nStatus = STREAM_NONE;
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pChannel->nSectorOffset = _GET_OFFSET(offset);
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pChannel->nSectorsToRead = size;
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pChannel->pBuffer = buffer;
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pChannel->bLocked = 0;
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#ifndef ONE_THREAD_PER_CHANNEL
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AddToQueue(&gChannelRequestQ, channel);
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if ( sem_post(&gCdStreamSema) != 0 )
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printf("Signal Sema Error\n");
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#else
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if ( sem_post(&gpReadInfo[channel].pStartSemaphore) != 0 )
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printf("Signal Sema Error\n");
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#endif
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return STREAM_SUCCESS;
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}
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int32
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CdStreamGetStatus(int32 channel)
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{
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ASSERT( channel < gNumChannels );
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CdReadInfo *pChannel = &gpReadInfo[channel];
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ASSERT( pChannel != nil );
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#ifdef ONE_THREAD_PER_CHANNEL
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if (pChannel->nThreadStatus == 2)
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return STREAM_NONE;
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#else
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if (gCdStreamThreadStatus == 2)
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return STREAM_NONE;
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#endif
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if ( pChannel->bReading )
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return STREAM_READING;
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if ( pChannel->nSectorsToRead != 0 )
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return STREAM_WAITING;
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if ( pChannel->nStatus != STREAM_NONE )
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{
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int32 status = pChannel->nStatus;
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pChannel->nStatus = STREAM_NONE;
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return status;
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}
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return STREAM_NONE;
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}
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int32
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CdStreamGetLastPosn(void)
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{
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return lastPosnRead;
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}
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// wait for channel to finish reading
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int32
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CdStreamSync(int32 channel)
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{
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ASSERT( channel < gNumChannels );
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CdReadInfo *pChannel = &gpReadInfo[channel];
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ASSERT( pChannel != nil );
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if (flushStream[channel]) {
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#ifdef ONE_THREAD_PER_CHANNEL
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pChannel->nSectorsToRead = 0;
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pthread_kill(gpReadInfo[channel].pChannelThread, SIGINT);
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#else
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if (pChannel->bReading) {
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pChannel->nSectorsToRead = 0;
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pthread_kill(_gCdStreamThread, SIGINT);
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} else {
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pChannel->nSectorsToRead = 0;
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}
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#endif
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pChannel->bReading = false;
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flushStream[channel] = false;
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return STREAM_NONE;
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}
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if ( pChannel->nSectorsToRead != 0 )
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{
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pChannel->bLocked = true;
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sem_wait(&pChannel->pDoneSemaphore);
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}
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pChannel->bReading = false;
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return pChannel->nStatus;
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}
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void
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AddToQueue(Queue *queue, int32 item)
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{
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ASSERT( queue != nil );
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ASSERT( queue->items != nil );
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queue->items[queue->tail] = item;
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queue->tail = (queue->tail + 1) % queue->size;
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if ( queue->head == queue->tail )
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debug("Queue is full\n");
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}
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int32
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GetFirstInQueue(Queue *queue)
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{
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ASSERT( queue != nil );
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if ( queue->head == queue->tail )
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return -1;
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ASSERT( queue->items != nil );
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return queue->items[queue->head];
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}
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void
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RemoveFirstInQueue(Queue *queue)
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{
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ASSERT( queue != nil );
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if ( queue->head == queue->tail )
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{
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debug("Queue is empty\n");
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return;
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}
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queue->head = (queue->head + 1) % queue->size;
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}
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void *CdStreamThread(void *param)
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{
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debug("Created cdstream thread\n");
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#ifndef ONE_THREAD_PER_CHANNEL
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while (gCdStreamThreadStatus != 2) {
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sem_wait(&gCdStreamSema);
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int32 channel = GetFirstInQueue(&gChannelRequestQ);
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#else
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int channel = *((int*)param);
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while (gpReadInfo[channel].nThreadStatus != 2){
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sem_wait(&gpReadInfo[channel].pStartSemaphore);
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#endif
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ASSERT( channel < gNumChannels );
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CdReadInfo *pChannel = &gpReadInfo[channel];
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ASSERT( pChannel != nil );
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#ifdef ONE_THREAD_PER_CHANNEL
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if (gpReadInfo[channel].nThreadStatus == 0){
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gpReadInfo[channel].nThreadStatus = 1;
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#else
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if (gCdStreamThreadStatus == 0){
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gCdStreamThreadStatus = 1;
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#endif
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#ifdef __linux__
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pid_t tid = syscall(SYS_gettid);
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int ret = setpriority(PRIO_PROCESS, tid, getpriority(PRIO_PROCESS, getpid()) + 1);
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#endif
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}
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// spurious wakeup or we sent interrupt signal for flushing
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if(pChannel->nSectorsToRead == 0)
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continue;
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pChannel->bReading = true;
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if ( pChannel->nStatus == STREAM_NONE )
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{
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ASSERT(pChannel->hFile >= 0);
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ASSERT(pChannel->pBuffer != nil );
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lseek(pChannel->hFile, pChannel->nSectorOffset * CDSTREAM_SECTOR_SIZE, SEEK_SET);
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if (read(pChannel->hFile, pChannel->pBuffer, pChannel->nSectorsToRead * CDSTREAM_SECTOR_SIZE) == -1) {
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// pChannel->nSectorsToRead == 0 at this point means we wanted to flush channel
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pChannel->nStatus = pChannel->nSectorsToRead == 0 ? STREAM_NONE : STREAM_ERROR;
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} else {
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pChannel->nStatus = STREAM_NONE;
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}
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}
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#ifndef ONE_THREAD_PER_CHANNEL
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RemoveFirstInQueue(&gChannelRequestQ);
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#endif
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pChannel->nSectorsToRead = 0;
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if ( pChannel->bLocked )
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{
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sem_post(&pChannel->pDoneSemaphore);
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}
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pChannel->bReading = false;
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}
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#ifndef ONE_THREAD_PER_CHANNEL
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for ( int32 i = 0; i < gNumChannels; i++ )
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{
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sem_destroy(&gpReadInfo[i].pDoneSemaphore);
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}
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sem_destroy(&gCdStreamSema);
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free(gChannelRequestQ.items);
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#else
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sem_destroy(&gpReadInfo[channel].pStartSemaphore);
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sem_destroy(&gpReadInfo[channel].pDoneSemaphore);
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#endif
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free(gpReadInfo);
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pthread_exit(nil);
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}
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bool
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CdStreamAddImage(char const *path)
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{
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ASSERT(path != nil);
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ASSERT(gNumImages < MAX_CDIMAGES);
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gImgFiles[gNumImages] = open(path, _gdwCdStreamFlags);
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// Fix case sensitivity and backslashes.
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if (gImgFiles[gNumImages] == -1) {
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char* real = casepath(path, false);
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if (real)
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{
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gImgFiles[gNumImages] = open(real, _gdwCdStreamFlags);
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free(real);
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}
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}
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if ( gImgFiles[gNumImages] == -1 ) {
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assert(false);
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return false;
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}
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gImgNames[gNumImages] = strdup(path);
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gImgFiles[gNumImages]++; // because -1: error 0: not used
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strcpy(gCdImageNames[gNumImages], path);
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gNumImages++;
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return true;
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}
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char *
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CdStreamGetImageName(int32 cd)
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{
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ASSERT(cd < MAX_CDIMAGES);
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if ( gImgFiles[cd] > 0)
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return gCdImageNames[cd];
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return nil;
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}
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void
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CdStreamRemoveImages(void)
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{
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for ( int32 i = 0; i < gNumChannels; i++ )
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CdStreamSync(i);
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for ( int32 i = 0; i < gNumImages; i++ )
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{
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close(gImgFiles[i] - 1);
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free(gImgNames[i]);
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gImgFiles[i] = 0;
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}
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gNumImages = 0;
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}
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int32
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CdStreamGetNumImages(void)
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{
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return gNumImages;
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}
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#endif
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