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core/CdStreamPosix: switch to named semaphores to support macOS 

macOS does not support unnamed semaphores. The functions return ENOSYS.
This commit is contained in:
Andrew Udvare 2020-10-01 03:21:06 -04:00
parent 01ea7801fd
commit bbb578c5b1
No known key found for this signature in database
GPG Key ID: 1AFD9AFC120C26DD
1 changed files with 33 additions and 54 deletions
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87
src/core/CdStreamPosix.cpp
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@ -4,7 +4,6 @@
#include <pthread.h>
#include <signal.h>
#include <semaphore.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/time.h>
@ -22,30 +21,6 @@
#define CDDEBUG(f, ...) debug ("%s: " f "\n", "cdvd_stream", ## __VA_ARGS__)
#define CDTRACE(f, ...) printf("%s: " f "\n", "cdvd_stream", ## __VA_ARGS__)
#ifdef __APPLE__
#define COMPAT_SEM_T sem_t *
int compat_sem_init(sem_t **ptr, __attribute__((unused)) int x, __attribute__((unused)) int y) {
*ptr = sem_open("/semaphore", O_CREAT, 0644, 1);
return *ptr == SEM_FAILED ? -1 : 0;
}
int compat_sem_post(sem_t **sem) {
return sem_post(*sem);
}
int compat_sem_wait(sem_t **sem) {
return sem_wait(*sem);
}
int compat_sem_destroy(sem_t **sem, const char * name) {
sem_close(*sem);
sem_unlink(name);
}
#else
#define COMPAT_SEM_T sem_t
#define compat_sem_post sem_post
#define compat_sem_destroy(x, y) sem_destroy(x)
#define compat_sem_init sem_init
#define compat_sem_wait sem_wait
#endif
// #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)
bool flushStream[MAX_CDCHANNELS];
@ -60,11 +35,11 @@ struct CdReadInfo
int32 nStatus;
#ifdef ONE_THREAD_PER_CHANNEL
int8 nThreadStatus; // 0: created 1:initalized 2:abort now
pthread_t pChannelThread;
COMPAT_SEM_T pStartSemaphore;
pthread_t pChannelThread;
sem_t *pStartSemaphore;
#endif
COMPAT_SEM_T pDoneSemaphore; // used for CdStreamSync
int32 hFile;
sem_t *pDoneSemaphore; // used for CdStreamSync
int32 hFile;
};
char gCdImageNames[MAX_CDIMAGES+1][64];
@ -76,7 +51,7 @@ char *gImgNames[MAX_CDIMAGES];
#ifndef ONE_THREAD_PER_CHANNEL
pthread_t _gCdStreamThread;
COMPAT_SEM_T gCdStreamSema; // released when we have new thing to read(so channel is set)
sem_t *gCdStreamSema; // released when we have new thing to read(so channel is set)
int8 gCdStreamThreadStatus; // 0: created 1:initalized 2:abort now
Queue gChannelRequestQ;
bool _gbCdStreamOverlapped;
@ -101,11 +76,11 @@ CdStreamInitThread(void)
gChannelRequestQ.tail = 0;
gChannelRequestQ.size = gNumChannels + 1;
ASSERT(gChannelRequestQ.items != nil );
status = compat_sem_init(&gCdStreamSema, 0, 0);
gCdStreamSema = sem_open("/semaphore_cd_stream", O_CREAT, 0644, 1);
#endif
if (status == -1) {
if (gCdStreamSema == SEM_FAILED) {
CDTRACE("failed to create stream semaphore");
ASSERT(0);
return;
@ -116,18 +91,18 @@ CdStreamInitThread(void)
{
for ( int32 i = 0; i < gNumChannels; i++ )
{
status = compat_sem_init(&gpReadInfo[i].pDoneSemaphore, 0, 0);
gpReadInfo[i].pDoneSemaphore = sem_open("/semaphore_done", O_CREAT, 0644, 1);
if (status == -1)
if (gpReadInfo[i].pDoneSemaphore == SEM_FAILED)
{
CDTRACE("failed to create sync semaphore");
ASSERT(0);
return;
}
#ifdef ONE_THREAD_PER_CHANNEL
status = compat_sem_init(&gpReadInfo[i].pStartSemaphore, 0, 0);
gpReadInfo[i].pStartSemaphore = sem_open("/semaphore_start", O_CREAT, 0644, 1);
if (status == -1)
if (gpReadInfo[i].pStartSemaphore == SEM_FAILED)
{
CDTRACE("failed to create start semaphore");
ASSERT(0);
@ -160,7 +135,7 @@ CdStreamInitThread(void)
return;
}
#else
debug("Using seperate streaming threads for each channel\n");
debug("Using separate streaming threads for each channel\n");
#endif
}
@ -239,13 +214,13 @@ CdStreamShutdown(void)
// Destroying semaphores and free(gpReadInfo) will be done at threads
#ifndef ONE_THREAD_PER_CHANNEL
gCdStreamThreadStatus = 2;
compat_sem_post(&gCdStreamSema);
sem_post(gCdStreamSema);
#endif
#ifdef ONE_THREAD_PER_CHANNEL
for ( int32 i = 0; i < gNumChannels; i++ ) {
gpReadInfo[i].nThreadStatus = 2;
compat_sem_post(&gpReadInfo[i].pStartSemaphore);
sem_post(&gpReadInfo[i].pStartSemaphore);
}
#endif
}
@ -279,10 +254,10 @@ CdStreamRead(int32 channel, void *buffer, uint32 offset, uint32 size)
#ifndef ONE_THREAD_PER_CHANNEL
AddToQueue(&gChannelRequestQ, channel);
if ( compat_sem_post(&gCdStreamSema) != 0 )
if ( sem_post(gCdStreamSema) != 0 )
printf("Signal Sema Error\n");
#else
if ( compat_sem_post(&gpReadInfo[channel].pStartSemaphore) != 0 )
if ( sem_post(&gpReadInfo[channel].pStartSemaphore) != 0 )
printf("Signal Sema Error\n");
#endif
@ -357,7 +332,7 @@ CdStreamSync(int32 channel)
{
pChannel->bLocked = true;
compat_sem_wait(&pChannel->pDoneSemaphore);
sem_wait(pChannel->pDoneSemaphore);
}
pChannel->bReading = false;
@ -408,12 +383,12 @@ void *CdStreamThread(void *param)
#ifndef ONE_THREAD_PER_CHANNEL
while (gCdStreamThreadStatus != 2) {
compat_sem_wait(&gCdStreamSema);
sem_wait(gCdStreamSema);
int32 channel = GetFirstInQueue(&gChannelRequestQ);
#else
int channel = *((int*)param);
while (gpReadInfo[channel].nThreadStatus != 2){
compat_sem_wait(&gpReadInfo[channel].pStartSemaphore);
sem_wait(&gpReadInfo[channel].pStartSemaphore);
#endif
ASSERT( channel < gNumChannels );
@ -462,22 +437,26 @@ void *CdStreamThread(void *param)
if ( pChannel->bLocked )
{
compat_sem_post(&pChannel->pDoneSemaphore);
sem_post(pChannel->pDoneSemaphore);
}
pChannel->bReading = false;
}
#ifndef ONE_THREAD_PER_CHANNEL
for ( int32 i = 0; i < gNumChannels; i++ )
{
compat_sem_destroy(&gpReadInfo[i].pDoneSemaphore, "/semaphoredone");
}
compat_sem_destroy(&gCdStreamSema, "/semaphore");
free(gChannelRequestQ.items);
for ( int32 i = 0; i < gNumChannels; i++ )
{
sem_close(gpReadInfo[i].pDoneSemaphore);
sem_unlink("/semaphore_done");
}
sem_close(gCdStreamSema);
sem_unlink("/semaphore_cd_stream");
free(gChannelRequestQ.items);
#else
compat_sem_destroy(&gpReadInfo[channel].pStartSemaphore, "/semaphorestart");
compat_sem_destroy(&gpReadInfo[channel].pDoneSemaphore, "/semaphoredone");
sem_close(gpReadInfo[channel].pStartSemaphore);
sem_unlink("/semaphore_start");
sem_close(gpReadInfo[channel].pDoneSemaphore);
sem_unlink("/semaphore_done");
#endif
free(gpReadInfo);
free(gpReadInfo);
pthread_exit(nil);
}