thread.c

来自「非常好的dns解析软件」· C语言 代码 · 共 91 行

/*
 * Copyright (C) 2004, 2005  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and 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 1.18.18.6 2005/09/20 06:02:12 marka 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());
}