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Adds BeOS tr_condBroadcast implementation

This commit is contained in:
Eric Petit 2007-07-10 14:00:20 +00:00
parent 26b837ffc0
commit 2c141f9609
2 changed files with 52 additions and 20 deletions
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61
libtransmission/platform.c
View File

@ -270,7 +270,7 @@ void tr_lockClose( tr_lock_t * l )
int tr_lockTryLock( tr_lock_t * l )
{
#ifdef SYS_BEOS
#error how is this done in beos
return acquire_sem_etc( *l, 1, B_RELATIVE_TIMEOUT, 0 );
#else
/* success on zero! */
return pthread_mutex_trylock( l );
@ -299,7 +299,9 @@ void tr_lockUnlock( tr_lock_t * l )
void tr_condInit( tr_cond_t * c )
{
#ifdef SYS_BEOS
*c = -1;
c->sem = create_sem( 1, "" );
c->start = 0;
c->end = 0;
#else
pthread_cond_init( c, NULL );
#endif
@ -308,30 +310,51 @@ void tr_condInit( tr_cond_t * c )
void tr_condWait( tr_cond_t * c, tr_lock_t * l )
{
#ifdef SYS_BEOS
*c = find_thread( NULL );
/* Keep track of that thread */
acquire_sem( c->sem );
c->threads[c->end] = find_thread( NULL );
c->end = ( c->end + 1 ) % BEOS_MAX_THREADS;
assert( c->end != c->start ); /* We hit BEOS_MAX_THREADS, arggh */
release_sem( c->sem );
release_sem( *l );
suspend_thread( *c );
suspend_thread( find_thread( NULL ) ); /* Wait for signal */
acquire_sem( *l );
*c = -1;
#else
pthread_cond_wait( c, l );
#endif
}
#ifdef SYS_BEOS
static int condTrySignal( tr_cond_t * c )
{
if( c->start == c->end )
return 1;
for( ;; )
{
thread_info info;
get_thread_info( c->threads[c->start], &info );
if( info.state == B_THREAD_SUSPENDED )
{
resume_thread( c->threads[c->start] );
c->start = ( c->start + 1 ) % BEOS_MAX_THREADS;
break;
}
/* The thread is not suspended yet, which can happen since
* tr_condWait does not atomically suspends after releasing
* the semaphore. Wait a bit and try again. */
snooze( 5000 );
}
return 0;
}
#endif
void tr_condSignal( tr_cond_t * c )
{
#ifdef SYS_BEOS
while( *c != -1 )
{
thread_info info;
get_thread_info( *c, &info );
if( info.state == B_THREAD_SUSPENDED )
{
resume_thread( *c );
break;
}
snooze( 5000 );
}
acquire_sem( c->sem );
condTrySignal( c );
release_sem( c->sem );
#else
pthread_cond_signal( c );
#endif
@ -339,7 +362,9 @@ void tr_condSignal( tr_cond_t * c )
void tr_condBroadcast( tr_cond_t * c )
{
#ifdef SYS_BEOS
#error how is this done in beos
acquire_sem( c->sem );
while( !condTrySignal( c ) );
release_sem( c->sem );
#else
pthread_cond_broadcast( c );
#endif
@ -348,7 +373,7 @@ void tr_condBroadcast( tr_cond_t * c )
void tr_condClose( tr_cond_t * c )
{
#ifdef SYS_BEOS
*c = -1; /* Shut up gcc */
delete_sem( c->sem );
#else
pthread_cond_destroy( c );
#endif

11
libtransmission/platform.h
View File

@ -26,9 +26,16 @@
#ifdef SYS_BEOS
#include <kernel/OS.h>
#define BEOS_MAX_THREADS 256
typedef thread_id tr_thread_id_t;
typedef sem_id tr_lock_t;
typedef int tr_cond_t;
typedef struct
{
sem_id sem;
thread_id threads[BEOS_MAX_THREADS];
int start;
int end;
} tr_cond_t;
#else
#include <pthread.h>
typedef pthread_t tr_thread_id_t;
@ -40,7 +47,7 @@ typedef struct tr_thread_s
void (* func ) ( void * );
void * arg;
char * name;
tr_thread_id_t thread;;
tr_thread_id_t thread;
}
tr_thread_t;