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python3.2  3.2.2
Classes | Defines | Functions | Variables
thread_pth.h File Reference
#include <stdlib.h>
#include <string.h>
#include <pth.h>

Go to the source code of this file.

Classes

struct  pth_lock

Defines

#define CHECK_STATUS(name)   if (status == -1) { printf("%d ", status); perror(name); error = 1; }

Functions

static void PyThread__init_thread (void)
long PyThread_start_new_thread (void(*func)(void *), void *arg)
long PyThread_get_thread_ident (void)
void PyThread_exit_thread (void)
PyThread_type_lock PyThread_allocate_lock (void)
void PyThread_free_lock (PyThread_type_lock lock)
int PyThread_acquire_lock (PyThread_type_lock lock, int waitflag)
void PyThread_release_lock (PyThread_type_lock lock)

Variables

pth_attr_t PyThread_attr

Class Documentation

struct pth_lock

Definition at line 24 of file thread_pth.h.

Class Members
pth_cond_t lock_released
char locked
pth_mutex_t mut

Define Documentation

#define CHECK_STATUS (   name)    if (status == -1) { printf("%d ", status); perror(name); error = 1; }

Definition at line 31 of file thread_pth.h.


Function Documentation

static void PyThread__init_thread ( void  ) [static]

Definition at line 39 of file thread_pth.h.

{
    pth_init();
    PyThread_attr = pth_attr_new();
    pth_attr_set(PyThread_attr, PTH_ATTR_STACK_SIZE, 1<<18);
    pth_attr_set(PyThread_attr, PTH_ATTR_JOINABLE, FALSE);
}
int PyThread_acquire_lock ( PyThread_type_lock  lock,
int  waitflag 
)

Definition at line 123 of file thread_pth.h.

{
    int success;
    pth_lock *thelock = (pth_lock *)lock;
    int status, error = 0;

    dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));

    status = pth_mutex_acquire(&thelock->mut, !waitflag, NULL);
    CHECK_STATUS("pth_mutex_acquire[1]");
    success = thelock->locked == 0;
    if (success) thelock->locked = 1;
    status = pth_mutex_release( &thelock->mut );
    CHECK_STATUS("pth_mutex_release[1]");

    if ( !success && waitflag ) {
        /* continue trying until we get the lock */

        /* mut must be locked by me -- part of the condition
         * protocol */
        status = pth_mutex_acquire( &thelock->mut, !waitflag, NULL );
        CHECK_STATUS("pth_mutex_acquire[2]");
        while ( thelock->locked ) {
            status = pth_cond_await(&thelock->lock_released,
                                    &thelock->mut, NULL);
            CHECK_STATUS("pth_cond_await");
        }
        thelock->locked = 1;
        status = pth_mutex_release( &thelock->mut );
        CHECK_STATUS("pth_mutex_release[2]");
        success = 1;
    }
    if (error) success = 0;
    dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
    return success;
}

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Definition at line 88 of file thread_pth.h.

{
    pth_lock *lock;
    int status, error = 0;

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

    lock = (pth_lock *) malloc(sizeof(pth_lock));
    memset((void *)lock, '\0', sizeof(pth_lock));
    if (lock) {
        lock->locked = 0;
        status = pth_mutex_init(&lock->mut);
        CHECK_STATUS("pth_mutex_init");
        status = pth_cond_init(&lock->lock_released);
        CHECK_STATUS("pth_cond_init");
        if (error) {
            free((void *)lock);
            lock = NULL;
        }
    }
    dprintf(("PyThread_allocate_lock() -> %p\n", lock));
    return (PyThread_type_lock) lock;
}

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Definition at line 77 of file thread_pth.h.

{
    dprintf(("PyThread_exit_thread called\n"));
    if (!initialized) {
        exit(0);
    }
}

Definition at line 114 of file thread_pth.h.

{
    pth_lock *thelock = (pth_lock *)lock;

    dprintf(("PyThread_free_lock(%p) called\n", lock));

    free((void *)thelock);
}

Definition at line 67 of file thread_pth.h.

{
    volatile pth_t threadid;
    if (!initialized)
        PyThread_init_thread();
    /* Jump through some hoops for Alpha OSF/1 */
    threadid = pth_self();
    return (long) *(long *) &threadid;
}

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Definition at line 160 of file thread_pth.h.

{
    pth_lock *thelock = (pth_lock *)lock;
    int status, error = 0;

    dprintf(("PyThread_release_lock(%p) called\n", lock));

    status = pth_mutex_acquire( &thelock->mut, 0, NULL );
    CHECK_STATUS("pth_mutex_acquire[3]");

    thelock->locked = 0;

    status = pth_mutex_release( &thelock->mut );
    CHECK_STATUS("pth_mutex_release[3]");

    /* wake up someone (anyone, if any) waiting on the lock */
    status = pth_cond_notify( &thelock->lock_released, 0 );
    CHECK_STATUS("pth_cond_notify");
}

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long PyThread_start_new_thread ( void(*)(void *)  func,
void arg 
)

Definition at line 52 of file thread_pth.h.

{
    pth_t th;
    dprintf(("PyThread_start_new_thread called\n"));
    if (!initialized)
        PyThread_init_thread();

    th = pth_spawn(PyThread_attr,
                             (void* (*)(void *))func,
                             (void *)arg
                             );

    return th;
}

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Variable Documentation

pth_attr_t PyThread_attr

Definition at line 33 of file thread_pth.h.