Revert 129069 - Import libusb 1.0.9-rc3 into third_party.

third_party/libusb/libusb/os/threads_windows.c

Index: third_party/libusb/libusb/os/threads_windows.c
===================================================================
--- third_party/libusb/libusb/os/threads_windows.c	(revision 129100)
+++ third_party/libusb/libusb/os/threads_windows.c	(working copy)
@@ -1,208 +0,0 @@
-/*
- * libusb synchronization on Microsoft Windows
- *
- * Copyright (C) 2010 Michael Plante <michael.plante@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <config.h>
-#include <objbase.h>
-#include <errno.h>
-#include <stdarg.h>
-
-#include "libusbi.h"
-
-
-int usbi_mutex_init(usbi_mutex_t *mutex,
-					const usbi_mutexattr_t *attr) {
-	if(! mutex) return ((errno=EINVAL));
-	*mutex = CreateMutex(NULL, FALSE, NULL);
-	if(!*mutex) return ((errno=ENOMEM));
-	return 0;
-}
-int usbi_mutex_destroy(usbi_mutex_t *mutex) {
-	// It is not clear if CloseHandle failure is due to failure to unlock.
-	//   If so, this should be errno=EBUSY.
-	if(!mutex || !CloseHandle(*mutex)) return ((errno=EINVAL));
-	*mutex = NULL;
-	return 0;
-}
-int usbi_mutex_trylock(usbi_mutex_t *mutex) {
-	DWORD result;
-	if(!mutex) return ((errno=EINVAL));
-	result = WaitForSingleObject(*mutex, 0);
-	if(result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
-		return 0; // acquired (ToDo: check that abandoned is ok)
-	if(result == WAIT_TIMEOUT)
-		return ((errno=EBUSY));
-	return ((errno=EINVAL)); // don't know how this would happen
-							 //   so don't know proper errno
-}
-int usbi_mutex_lock(usbi_mutex_t *mutex) {
-	DWORD result;
-	if(!mutex) return ((errno=EINVAL));
-	result = WaitForSingleObject(*mutex, INFINITE);
-	if(result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
-		return 0; // acquired (ToDo: check that abandoned is ok)
-	return ((errno=EINVAL)); // don't know how this would happen
-							 //   so don't know proper errno
-}
-int usbi_mutex_unlock(usbi_mutex_t *mutex) {
-	if(!mutex)                return ((errno=EINVAL));
-	if(!ReleaseMutex(*mutex)) return ((errno=EPERM ));
-	return 0;
-}
-
-int usbi_mutex_static_lock(usbi_mutex_static_t *mutex) {
-	if(!mutex)               return ((errno=EINVAL));
-	while (InterlockedExchange((LONG *)mutex, 1) == 1) {
-		SleepEx(0, TRUE);
-	}
-	return 0;
-}
-int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex) {
-	if(!mutex)               return ((errno=EINVAL));
-	*mutex = 0;
-	return 0;
-}
-
-
-
-int usbi_cond_init(usbi_cond_t *cond,
-				   const usbi_condattr_t *attr) {
-	if(!cond)           return ((errno=EINVAL));
-	list_init(&cond->waiters    );
-	list_init(&cond->not_waiting);
-	return 0;
-}
-int usbi_cond_destroy(usbi_cond_t *cond) {
-	// This assumes no one is using this anymore.  The check MAY NOT BE safe.
-	struct usbi_cond_perthread *pos, *prev_pos = NULL;
-	if(!cond) return ((errno=EINVAL));
-	if(!list_empty(&cond->waiters)) return ((errno=EBUSY )); // (!see above!)
-	list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
-		free(prev_pos);
-		list_del(&pos->list);
-		prev_pos = pos;
-	}
-	free(prev_pos);
-	prev_pos = pos = NULL;
-
-	return 0;
-}
-
-int usbi_cond_broadcast(usbi_cond_t *cond) {
-	// Assumes mutex is locked; this is not in keeping with POSIX spec, but
-	//   libusb does this anyway, so we simplify by not adding more sync
-	//   primitives to the CV definition!
-	int fail = 0;
-	struct usbi_cond_perthread *pos;
-	if(!cond)                      return ((errno=EINVAL));
-	list_for_each_entry(pos, &cond->waiters, list, struct usbi_cond_perthread) {
-		if(!SetEvent(pos->event))
-			fail = 1;
-	}
-	// The wait function will remove its respective item from the list.
-	return fail ? ((errno=EINVAL)) : 0;
-}
-int usbi_cond_signal(usbi_cond_t *cond) {
-	// Assumes mutex is locked; this is not in keeping with POSIX spec, but
-	//   libusb does this anyway, so we simplify by not adding more sync
-	//   primitives to the CV definition!
-	struct usbi_cond_perthread *pos;
-	if(!cond)                      return ((errno=EINVAL));
-	if(list_empty(&cond->waiters)) return 0; // no one to wakeup.
-	pos = list_entry(&cond->waiters.next, struct usbi_cond_perthread, list);
-	// The wait function will remove its respective item from the list.
-	return SetEvent(pos->event) ? 0 : ((errno=EINVAL));
-}
-static int __inline usbi_cond_intwait(usbi_cond_t *cond,
-									  usbi_mutex_t *mutex,
-									  DWORD timeout_ms) {
-	struct usbi_cond_perthread *pos;
-	int found = 0, r;
-	DWORD r2,tid = GetCurrentThreadId();
-	if(!cond || !mutex) return ((errno=EINVAL));
-	list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
-		if(tid == pos->tid) {
-			found = 1;
-			break;
-		}
-	}
-	if(!found) {
-		pos      = malloc(sizeof(struct usbi_cond_perthread));
-		if(!pos) return ((errno=ENOMEM)); // This errno is not POSIX-allowed.
-		pos->tid = tid;
-		pos->event = CreateEvent(NULL, FALSE, FALSE, NULL); // auto-reset.
-		if(!pos->event) {
-			free(pos);
-			return      ((errno=ENOMEM));
-		}
-		list_add(&pos->list, &cond->not_waiting);
-	}
-
-	list_del(&pos->list); // remove from not_waiting list.
-	list_add(&pos->list, &cond->waiters);
-
-	r  = usbi_mutex_unlock(mutex);
-	if(r) return r;
-	r2 = WaitForSingleObject(pos->event, timeout_ms);
-	r  = usbi_mutex_lock(mutex);
-	if(r) return r;
-
-	list_del(&pos->list);
-	list_add(&pos->list, &cond->not_waiting);
-
-	if(r2 == WAIT_TIMEOUT) return ((errno=ETIMEDOUT));
-
-	return 0;
-}
-// N.B.: usbi_cond_*wait() can also return ENOMEM, even though pthread_cond_*wait cannot!
-int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex) {
-	return usbi_cond_intwait(cond, mutex, INFINITE);
-}
-int usbi_cond_timedwait(usbi_cond_t *cond,
-						usbi_mutex_t *mutex,
-						const struct timespec *abstime) {
-	FILETIME filetime;
-	ULARGE_INTEGER rtime;
-	struct timeval targ_time, cur_time, delta_time;
-	struct timespec cur_time_ns;
-	DWORD millis;
-	extern const uint64_t epoch_time;
-
-	GetSystemTimeAsFileTime(&filetime);
-	rtime.LowPart   = filetime.dwLowDateTime;
-	rtime.HighPart  = filetime.dwHighDateTime;
-	rtime.QuadPart -= epoch_time;
-	cur_time_ns.tv_sec = (long)(rtime.QuadPart / 10000000);
-	cur_time_ns.tv_nsec = (long)((rtime.QuadPart % 10000000)*100);
-	TIMESPEC_TO_TIMEVAL(&cur_time, &cur_time_ns);
-
-	TIMESPEC_TO_TIMEVAL(&targ_time, abstime);
-	timersub(&targ_time, &cur_time, &delta_time);
-	if(delta_time.tv_sec < 0) // abstime already passed?
-		millis = 0;
-	else {
-		millis  = delta_time.tv_usec/1000;
-		millis += delta_time.tv_sec *1000;
-		if (delta_time.tv_usec % 1000) // round up to next millisecond
-			millis++;
-	}
-
-	return usbi_cond_intwait(cond, mutex, millis);
-}
-