isc/win32/thread.c

	thread.c revision 70e5a7403f0e0a3bd292b8287c5fed5772c15270
/*
 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: thread.c,v 1.24 2007/06/19 23:47:19 tbox Exp $ */

#include <config.h>

#include <process.h>

#include <isc/thread.h>

isc_result_t
isc_thread_create(isc_threadfunc_t start, isc_threadarg_t arg,
          isc_thread_t *threadp)
{
    isc_thread_t thread;
    unsigned int id;

    thread = (isc_thread_t)_beginthreadex(NULL, 0, start, arg, 0, &id);
    if (thread == NULL) {
        /* XXX */
        return (ISC_R_UNEXPECTED);
    }

    *threadp = thread;

    return (ISC_R_SUCCESS);
}

isc_result_t
isc_thread_join(isc_thread_t thread, isc_threadresult_t *rp) {
    DWORD result;

    result = WaitForSingleObject(thread, INFINITE);
    if (result != WAIT_OBJECT_0) {
        /* XXX */
        return (ISC_R_UNEXPECTED);
    }
    if (rp != NULL && !GetExitCodeThread(thread, rp)) {
        /* XXX */
        return (ISC_R_UNEXPECTED);
    }
    (void)CloseHandle(thread);

    return (ISC_R_SUCCESS);
}

void
isc_thread_setconcurrency(unsigned int level) {
    /*
     * This is unnecessary on Win32 systems, but is here so that the
     * call exists
     */
}

void *
isc_thread_key_getspecific(isc_thread_key_t key) {
    return(TlsGetValue(key));
}

int
isc_thread_key_setspecific(isc_thread_key_t key, void *value) {
    return (TlsSetValue(key, value) ? 0 : GetLastError());
}

int
isc_thread_key_create(isc_thread_key_t *key, void (*func)(void *)) {
    *key = TlsAlloc();

    return ((*key != -1) ? 0 : GetLastError());
}

int
isc_thread_key_delete(isc_thread_key_t key) {
    return (TlsFree(key) ? 0 : GetLastError());
}