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Add system-specific implementations of idle_{wait,resume} functions.

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This commit is contained in:
gbeauche 2005-06-30 10:20:18 +00:00
parent 08c5f8b713
commit e355c83f59
5 changed files with 112 additions and 0 deletions
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19
BasiliskII/src/BeOS/timer_beos.cpp
View File

@ -130,3 +130,22 @@ void Delay_usec(uint32 usec)
{
snooze(usec);
}
/*
* Suspend emulator thread, virtual CPU in idle mode
*/
void idle_wait(void)
{
sleep(16667);
}
/*
* Resume execution of emulator thread, events just arrived
*/
void idle_resume(void)
{
}

1
BasiliskII/src/Unix/configure.ac
View File

@ -202,6 +202,7 @@ AC_CHECK_LIB(pthread, pthread_create, , [
if [[ "x$HAVE_PTHREADS" = "xyes" ]]; then
AC_DEFINE(HAVE_PTHREADS, 1, [Define if pthreads are available.])
fi
AC_CHECK_FUNCS(pthread_cond_init)
AC_CHECK_FUNCS(pthread_cancel pthread_testcancel)
AC_CHECK_FUNCS(pthread_mutexattr_setprotocol)
AC_CHECK_FUNCS(pthread_mutexattr_settype)

69
BasiliskII/src/Unix/timer_unix.cpp
View File

@ -297,3 +297,72 @@ void Delay_usec(uint32 usec)
#endif
} while (was_error && (errno == EINTR));
}
/*
* Suspend emulator thread, virtual CPU in idle mode
*/
#ifdef HAVE_PTHREADS
#if defined(HAVE_PTHREAD_COND_INIT)
#define IDLE_USES_COND_WAIT 1
static pthread_mutex_t idle_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t idle_cond = PTHREAD_COND_INITIALIZER;
#elif defined(HAVE_SEM_INIT)
#define IDLE_USES_SEMAPHORE 1
#include <semaphore.h>
#ifdef HAVE_SPINLOCKS
static spinlock_t idle_lock = SPIN_LOCK_UNLOCKED;
#define LOCK_IDLE spin_lock(&idle_lock)
#define UNLOCK_IDLE spin_unlock(&idle_lock)
#else
static pthread_mutex_t idle_lock = PTHREAD_MUTEX_INITIALIZER;
#define LOCK_IDLE pthread_mutex_lock(&idle_lock)
#define UNLOCK_IDLE pthread_mutex_unlock(&idle_lock)
#endif
static sem_t idle_sem;
static int idle_sem_ok = -1;
#endif
#endif
void idle_wait(void)
{
#ifdef IDLE_USES_COND_WAIT
pthread_cond_wait(&idle_cond, &idle_lock);
#else
#ifdef IDLE_USES_SEMAPHORE
if (idle_sem_ok < 0)
idle_sem_ok = (sem_init(&idle_sem, 0, 0) == 0);
if (idle_sem_ok > 0) {
LOCK_IDLE;
idle_sem_ok++;
UNLOCK_IDLE;
sem_wait(&idle_sem);
return;
}
#endif
Delay_usec(10000);
#endif
}
/*
* Resume execution of emulator thread, events just arrived
*/
void idle_resume(void)
{
#ifdef IDLE_USES_COND_WAIT
pthread_cond_signal(&idle_cond);
#else
#ifdef IDLE_USES_SEMAPHORE
if (idle_sem_ok > 1) {
LOCK_IDLE;
idle_sem_ok--;
UNLOCK_IDLE;
sem_post(&idle_sem);
return;
}
#endif
#endif
}

19
BasiliskII/src/Windows/timer_windows.cpp
View File

@ -195,3 +195,22 @@ void Delay_usec(uint32 usec)
// millisecond resolution anyway
Sleep(usec / 1000);
}
/*
* Suspend emulator thread, virtual CPU in idle mode
*/
void idle_wait(void)
{
Delay_usec(10000);
}
/*
* Resume execution of emulator thread, events just arrived
*/
void idle_resume(void)
{
}

4
BasiliskII/src/include/timer.h
View File

@ -42,4 +42,8 @@ extern int timer_cmp_time(tm_time_t a, tm_time_t b);
extern void timer_mac2host_time(tm_time_t &res, int32 mactime);
extern int32 timer_host2mac_time(tm_time_t hosttime);
// Suspend execution of emulator thread and resume it on events
extern void idle_wait(void);
extern void idle_resume(void);
#endif