AmigActive 15/AACD15.ISO/AACD/Programming/Python2/Python20_source/Python/thread_solaris.h

C/C++ Source or Header | 2000-10-25 | 4.4 KB | 237 lines

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include </usr/include/thread.h>
#undef _POSIX_THREADS


/*
 * Initialization.
 */
static void PyThread__init_thread(void)
{
}

/*
 * Thread support.
 */
struct func_arg {
    void (*func)(void *);
    void *arg;
};

static void *
new_func(void *funcarg)
{
    void (*func)(void *);
    void *arg;

    func = ((struct func_arg *) funcarg)->func;
    arg = ((struct func_arg *) funcarg)->arg;
    free(funcarg);
    (*func)(arg);
    return 0;
}


int
PyThread_start_new_thread(void (*func)(void *), void *arg)
{
    struct func_arg *funcarg;
    int success = 0;    /* init not needed when SOLARIS_THREADS and */
                /* C_THREADS implemented properly */

    dprintf(("PyThread_start_new_thread called\n"));
    if (!initialized)
        PyThread_init_thread();
    funcarg = (struct func_arg *) malloc(sizeof(struct func_arg));
    funcarg->func = func;
    funcarg->arg = arg;
    if (thr_create(0, 0, new_func, funcarg,
               THR_DETACHED | THR_NEW_LWP, 0)) {
        perror("thr_create");
        free((void *) funcarg);
        success = -1;
    }
    return success < 0 ? 0 : 1;
}

long
PyThread_get_thread_ident(void)
{
    if (!initialized)
        PyThread_init_thread();
    return thr_self();
}

static void
do_PyThread_exit_thread(int no_cleanup)
{
    dprintf(("PyThread_exit_thread called\n"));
    if (!initialized)
        if (no_cleanup)
            _exit(0);
        else
            exit(0);
    thr_exit(0);
}

void
PyThread_exit_thread(void)
{
    do_PyThread_exit_thread(0);
}

void
PyThread__exit_thread(void)
{
    do_PyThread_exit_thread(1);
}

#ifndef NO_EXIT_PROG
static void
do_PyThread_exit_prog(int status, int no_cleanup)
{
    dprintf(("PyThread_exit_prog(%d) called\n", status));
    if (!initialized)
        if (no_cleanup)
            _exit(status);
        else
            exit(status);
    if (no_cleanup)
        _exit(status);
    else
        exit(status);
}

void
PyThread_exit_prog(int status)
{
    do_PyThread_exit_prog(status, 0);
}

void
PyThread__exit_prog(int status)
{
    do_PyThread_exit_prog(status, 1);
}
#endif /* NO_EXIT_PROG */

/*
 * Lock support.
 */
PyThread_type_lock
PyThread_allocate_lock(void)
{
    mutex_t *lock;

    dprintf(("PyThread_allocate_lock called\n"));
    if (!initialized)
        PyThread_init_thread();

    lock = (mutex_t *) malloc(sizeof(mutex_t));
    if (mutex_init(lock, USYNC_THREAD, 0)) {
        perror("mutex_init");
        free((void *) lock);
        lock = 0;
    }
    dprintf(("PyThread_allocate_lock() -> %p\n", lock));
    return (PyThread_type_lock) lock;
}

void
PyThread_free_lock(PyThread_type_lock lock)
{
    dprintf(("PyThread_free_lock(%p) called\n", lock));
    mutex_destroy((mutex_t *) lock);
    free((void *) lock);
}

int
PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
{
    int success;

    dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
    if (waitflag)
        success = mutex_lock((mutex_t *) lock);
    else
        success = mutex_trylock((mutex_t *) lock);
    if (success < 0)
        perror(waitflag ? "mutex_lock" : "mutex_trylock");
    else
        success = !success; /* solaris does it the other way round */
    dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
    return success;
}

void
PyThread_release_lock(PyThread_type_lock lock)
{
    dprintf(("PyThread_release_lock(%p) called\n", lock));
    if (mutex_unlock((mutex_t *) lock))
        perror("mutex_unlock");
}

/*
 * Semaphore support.
 */
PyThread_type_sema
PyThread_allocate_sema(int value)
{
    sema_t *sema;
    dprintf(("PyThread_allocate_sema called\n"));
    if (!initialized)
        PyThread_init_thread();

    sema = (sema_t *) malloc(sizeof(sema_t));
    if (sema_init(sema, value, USYNC_THREAD, 0)) {
        perror("sema_init");
        free((void *) sema);
        sema = 0;
    }
    dprintf(("PyThread_allocate_sema() -> %p\n",  sema));
    return (PyThread_type_sema) sema;
}

void
PyThread_free_sema(PyThread_type_sema sema)
{
    dprintf(("PyThread_free_sema(%p) called\n",  sema));
    if (sema_destroy((sema_t *) sema))
        perror("sema_destroy");
    free((void *) sema);
}

int
PyThread_down_sema(PyThread_type_sema sema, int waitflag)
{
    int success;

    dprintf(("PyThread_down_sema(%p) called\n",  sema));
    if (waitflag)
        success = sema_wait((sema_t *) sema);
    else
        success = sema_trywait((sema_t *) sema);
    if (success < 0) {
        if (errno == EBUSY)
            success = 0;
        else
            perror("sema_wait");
    }
    else
        success = !success;
    dprintf(("PyThread_down_sema(%p) return %d\n",  sema, success));
    return success;
}

void
PyThread_up_sema(PyThread_type_sema sema)
{
    dprintf(("PyThread_up_sema(%p)\n",  sema));
    if (sema_post((sema_t *) sema))
        perror("sema_post");
}