680 lines
15 KiB
C
680 lines
15 KiB
C
/**
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* WinPR: Windows Portable Runtime
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* Synchronization Functions
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*
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* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <assert.h>
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#include <errno.h>
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#include <winpr/crt.h>
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#include <winpr/synch.h>
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#include <winpr/platform.h>
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#include "synch.h"
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#include "../thread/thread.h"
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#include <winpr/thread.h>
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/**
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* WaitForSingleObject
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* WaitForSingleObjectEx
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* WaitForMultipleObjectsEx
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* SignalObjectAndWait
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*/
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#ifndef _WIN32
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#include <time.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include "../handle/handle.h"
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#include "../pipe/pipe.h"
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#ifdef __MACH__
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#include <mach/mach_time.h>
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#define CLOCK_REALTIME 0
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#define CLOCK_MONOTONIC 0
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int clock_gettime(int clk_id, struct timespec *t)
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{
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UINT64 time;
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double seconds;
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double nseconds;
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mach_timebase_info_data_t timebase;
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mach_timebase_info(&timebase);
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time = mach_absolute_time();
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nseconds = ((double) time * (double) timebase.numer) / ((double) timebase.denom);
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seconds = ((double) time * (double) timebase.numer) / ((double) timebase.denom * 1e9);
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t->tv_sec = seconds;
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t->tv_nsec = nseconds;
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return 0;
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}
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#endif
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/* Drop in replacement for the linux pthread_timedjoin_np and
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* pthread_mutex_timedlock functions.
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*/
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#if !defined(HAVE_PTHREAD_GNU_EXT)
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#include <pthread.h>
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static long long ts_difftime(const struct timespec *o,
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const struct timespec *n)
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{
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long long oldValue = o->tv_sec * 1000000000LL + o->tv_nsec;
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long long newValue = n->tv_sec * 1000000000LL + n->tv_nsec;
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return newValue - oldValue;
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}
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static int pthread_timedjoin_np(pthread_t td, void **res,
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struct timespec *timeout)
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{
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struct timespec timenow;
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struct timespec sleepytime;
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/* This is just to avoid a completely busy wait */
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sleepytime.tv_sec = 0;
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sleepytime.tv_nsec = 10000000; /* 10ms */
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do
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{
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if (pthread_kill(td, 0))
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return pthread_join(td, res);
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nanosleep(&sleepytime, NULL);
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clock_gettime(CLOCK_MONOTONIC, &timenow);
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if (ts_difftime(timeout, &timenow) >= 0)
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{
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return ETIMEDOUT;
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}
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}
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while (TRUE);
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return ETIMEDOUT;
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}
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#if defined(__FreeBSD__)
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/*the only way to get it work is to remove the static*/
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int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *timeout)
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#else
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static int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *timeout)
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#endif
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{
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struct timespec timenow;
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struct timespec sleepytime;
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int retcode;
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/* This is just to avoid a completely busy wait */
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sleepytime.tv_sec = 0;
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sleepytime.tv_nsec = 10000000; /* 10ms */
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while ((retcode = pthread_mutex_trylock (mutex)) == EBUSY)
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{
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clock_gettime(CLOCK_MONOTONIC, &timenow);
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if (ts_difftime(timeout, &timenow) >= 0)
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{
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return ETIMEDOUT;
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}
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nanosleep (&sleepytime, NULL);
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}
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return retcode;
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}
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#endif
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static void ts_add_ms(struct timespec *ts, DWORD dwMilliseconds)
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{
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ts->tv_sec += dwMilliseconds / 1000L;
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ts->tv_nsec += (dwMilliseconds % 1000L) * 1000000L;
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ts->tv_sec += ts->tv_nsec / 1000000000L;
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ts->tv_nsec = ts->tv_nsec % 1000000000L;
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}
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DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds)
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{
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ULONG Type;
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PVOID Object;
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if (!winpr_Handle_GetInfo(hHandle, &Type, &Object))
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{
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fprintf(stderr, "WaitForSingleObject failed: invalid hHandle.\n");
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return WAIT_FAILED;
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}
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if (Type == HANDLE_TYPE_THREAD)
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{
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int status = 0;
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WINPR_THREAD* thread;
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void* thread_status = NULL;
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thread = (WINPR_THREAD*) Object;
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if (thread->started)
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{
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if (dwMilliseconds != INFINITE)
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{
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struct timespec timeout;
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/* pthread_timedjoin_np returns ETIMEDOUT in case the timeout is 0,
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* so set it to the smallest value to get a proper return value. */
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if (dwMilliseconds == 0)
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dwMilliseconds ++;
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clock_gettime(CLOCK_MONOTONIC, &timeout);
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ts_add_ms(&timeout, dwMilliseconds);
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status = pthread_timedjoin_np(thread->thread, &thread_status, &timeout);
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if (ETIMEDOUT == status)
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return WAIT_TIMEOUT;
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}
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else
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status = pthread_join(thread->thread, &thread_status);
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if (status != 0)
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{
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fprintf(stderr, "WaitForSingleObject: pthread_join failure: [%d] %s\n",
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status, strerror(status));
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}
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if (thread_status)
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thread->dwExitCode = ((DWORD) (size_t) thread_status);
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}
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}
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else if (Type == HANDLE_TYPE_PROCESS)
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{
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WINPR_PROCESS* process;
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process = (WINPR_PROCESS*) Object;
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if (waitpid(process->pid, &(process->status), 0) != -1)
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{
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fprintf(stderr, "WaitForSingleObject: waitpid failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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process->dwExitCode = (DWORD) process->status;
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}
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else if (Type == HANDLE_TYPE_MUTEX)
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{
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WINPR_MUTEX* mutex;
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mutex = (WINPR_MUTEX*) Object;
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if (dwMilliseconds != INFINITE)
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{
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int status;
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struct timespec timeout;
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clock_gettime(CLOCK_MONOTONIC, &timeout);
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ts_add_ms(&timeout, dwMilliseconds);
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status = pthread_mutex_timedlock(&mutex->mutex, &timeout);
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if (ETIMEDOUT == status)
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return WAIT_TIMEOUT;
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}
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else
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{
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pthread_mutex_lock(&mutex->mutex);
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}
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}
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else if (Type == HANDLE_TYPE_EVENT)
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{
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int status;
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fd_set rfds;
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WINPR_EVENT* event;
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struct timeval timeout;
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event = (WINPR_EVENT*) Object;
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FD_ZERO(&rfds);
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FD_SET(event->pipe_fd[0], &rfds);
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ZeroMemory(&timeout, sizeof(timeout));
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if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
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{
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timeout.tv_sec = dwMilliseconds / 1000;
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timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
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}
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do
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{
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status = select(event->pipe_fd[0] + 1, &rfds, NULL, NULL,
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(dwMilliseconds == INFINITE) ? NULL : &timeout);
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}
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while (status < 0 && (errno == EINTR));
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if (status < 0)
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{
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fprintf(stderr, "WaitForSingleObject: event select() failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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if (status != 1)
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return WAIT_TIMEOUT;
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}
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else if (Type == HANDLE_TYPE_SEMAPHORE)
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{
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WINPR_SEMAPHORE* semaphore;
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semaphore = (WINPR_SEMAPHORE*) Object;
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#ifdef WINPR_PIPE_SEMAPHORE
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if (semaphore->pipe_fd[0] != -1)
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{
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int status;
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int length;
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fd_set rfds;
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struct timeval timeout;
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FD_ZERO(&rfds);
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FD_SET(semaphore->pipe_fd[0], &rfds);
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ZeroMemory(&timeout, sizeof(timeout));
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if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
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{
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timeout.tv_sec = dwMilliseconds / 1000;
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timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
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}
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do
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{
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status = select(semaphore->pipe_fd[0] + 1, &rfds, 0, 0,
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(dwMilliseconds == INFINITE) ? NULL : &timeout);
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}
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while (status < 0 && (errno == EINTR));
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if (status < 0)
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{
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fprintf(stderr, "WaitForSingleObject: semaphore select() failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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if (status != 1)
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return WAIT_TIMEOUT;
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length = read(semaphore->pipe_fd[0], &length, 1);
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if (length != 1)
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{
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fprintf(stderr, "WaitForSingleObject: semaphore read failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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}
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#else
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#if defined __APPLE__
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semaphore_wait(*((winpr_sem_t*) semaphore->sem));
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#else
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sem_wait((winpr_sem_t*) semaphore->sem);
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#endif
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#endif
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}
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else if (Type == HANDLE_TYPE_TIMER)
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{
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WINPR_TIMER* timer;
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timer = (WINPR_TIMER*) Object;
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#ifdef HAVE_EVENTFD_H
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if (timer->fd != -1)
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{
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int status;
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fd_set rfds;
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UINT64 expirations;
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struct timeval timeout;
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FD_ZERO(&rfds);
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FD_SET(timer->fd, &rfds);
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ZeroMemory(&timeout, sizeof(timeout));
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if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
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{
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timeout.tv_sec = dwMilliseconds / 1000;
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timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
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}
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do
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{
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status = select(timer->fd + 1, &rfds, 0, 0,
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(dwMilliseconds == INFINITE) ? NULL : &timeout);
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}
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while (status < 0 && (errno == EINTR));
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if (status < 0)
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{
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fprintf(stderr, "WaitForSingleObject: timer select() failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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if (status != 1)
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return WAIT_TIMEOUT;
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status = read(timer->fd, (void*) &expirations, sizeof(UINT64));
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if (status != 8)
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{
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if (status == -1)
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{
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if (errno == ETIMEDOUT)
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return WAIT_TIMEOUT;
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fprintf(stderr, "WaitForSingleObject: timer read() failure [%d] %s\n", errno, strerror(errno));
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}
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else
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{
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fprintf(stderr, "WaitForSingleObject: timer read() failure - incorrect number of bytes read");
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}
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return WAIT_FAILED;
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}
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}
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else
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{
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fprintf(stderr, "WaitForSingleObject: invalid timer file descriptor\n");
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return WAIT_FAILED;
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}
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#else
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fprintf(stderr, "WaitForSingleObject: file descriptors not supported\n");
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return WAIT_FAILED;
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#endif
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}
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else if (Type == HANDLE_TYPE_NAMED_PIPE)
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{
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int fd;
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int status;
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fd_set rfds;
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struct timeval timeout;
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WINPR_NAMED_PIPE* pipe = (WINPR_NAMED_PIPE*) Object;
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fd = (pipe->ServerMode) ? pipe->serverfd : pipe->clientfd;
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if (fd == -1)
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{
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fprintf(stderr, "WaitForSingleObject: invalid pipe file descriptor\n");
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return WAIT_FAILED;
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}
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FD_ZERO(&rfds);
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FD_SET(fd, &rfds);
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ZeroMemory(&timeout, sizeof(timeout));
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if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
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{
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timeout.tv_sec = dwMilliseconds / 1000;
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timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
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}
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do
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{
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status = select(fd + 1, &rfds, NULL, NULL,
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(dwMilliseconds == INFINITE) ? NULL : &timeout);
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}
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while (status < 0 && (errno == EINTR));
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if (status < 0)
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{
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fprintf(stderr, "WaitForSingleObject: named pipe select() failure [%d] %s\n", errno, strerror(errno));
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return WAIT_FAILED;
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}
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if (status != 1)
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{
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return WAIT_TIMEOUT;
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}
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}
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else
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{
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fprintf(stderr, "WaitForSingleObject: unknown handle type %d\n", (int) Type);
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}
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return WAIT_OBJECT_0;
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}
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DWORD WaitForSingleObjectEx(HANDLE hHandle, DWORD dwMilliseconds, BOOL bAlertable)
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{
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fprintf(stderr, "[ERROR] %s: Function not implemented.\n", __func__);
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assert(0);
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return WAIT_OBJECT_0;
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}
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DWORD WaitForMultipleObjects(DWORD nCount, const HANDLE* lpHandles, BOOL bWaitAll, DWORD dwMilliseconds)
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{
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int fd = -1;
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int maxfd;
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int index;
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int status;
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fd_set fds;
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ULONG Type;
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PVOID Object;
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struct timeval timeout;
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if (!nCount)
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid handles count\n");
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return WAIT_FAILED;
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}
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maxfd = 0;
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FD_ZERO(&fds);
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ZeroMemory(&timeout, sizeof(timeout));
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if (bWaitAll)
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{
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fprintf(stderr, "WaitForMultipleObjects: bWaitAll not yet implemented\n");
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assert(0);
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}
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for (index = 0; index < nCount; index++)
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{
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if (!winpr_Handle_GetInfo(lpHandles[index], &Type, &Object))
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid handle\n");
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return WAIT_FAILED;
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}
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if (Type == HANDLE_TYPE_EVENT)
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{
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fd = ((WINPR_EVENT*) Object)->pipe_fd[0];
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if (fd == -1)
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid event file descriptor\n");
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return WAIT_FAILED;
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}
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}
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else if (Type == HANDLE_TYPE_SEMAPHORE)
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{
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#ifdef WINPR_PIPE_SEMAPHORE
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fd = ((WINPR_SEMAPHORE*) Object)->pipe_fd[0];
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#else
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fprintf(stderr, "WaitForMultipleObjects: semaphore not supported\n");
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return WAIT_FAILED;
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#endif
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}
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else if (Type == HANDLE_TYPE_TIMER)
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{
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WINPR_TIMER* timer = (WINPR_TIMER*) Object;
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fd = timer->fd;
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if (fd == -1)
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid timer file descriptor\n");
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return WAIT_FAILED;
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}
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}
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else if (Type == HANDLE_TYPE_NAMED_PIPE)
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{
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WINPR_NAMED_PIPE* pipe = (WINPR_NAMED_PIPE*) Object;
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fd = (pipe->ServerMode) ? pipe->serverfd : pipe->clientfd;
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if (fd == -1)
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid timer file descriptor\n");
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return WAIT_FAILED;
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}
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}
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else
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{
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fprintf(stderr, "WaitForMultipleObjects: unknown handle type %d\n", (int) Type);
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return WAIT_FAILED;
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}
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if (fd == -1)
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{
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fprintf(stderr, "WaitForMultipleObjects: invalid file descriptor\n");
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return WAIT_FAILED;
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}
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FD_SET(fd, &fds);
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if (fd > maxfd)
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maxfd = fd;
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}
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if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
|
|
{
|
|
timeout.tv_sec = dwMilliseconds / 1000;
|
|
timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
|
|
}
|
|
|
|
do
|
|
{
|
|
status = select(maxfd + 1, &fds, 0, 0,
|
|
(dwMilliseconds == INFINITE) ? NULL : &timeout);
|
|
}
|
|
while (status < 0 && errno == EINTR);
|
|
|
|
if (status < 0)
|
|
{
|
|
fprintf(stderr, "WaitForMultipleObjects: select() failure [%d] %s\n", errno, strerror(errno));
|
|
return WAIT_FAILED;
|
|
}
|
|
|
|
if (status == 0)
|
|
return WAIT_TIMEOUT;
|
|
|
|
for (index = 0; index < nCount; index++)
|
|
{
|
|
winpr_Handle_GetInfo(lpHandles[index], &Type, &Object);
|
|
|
|
if (Type == HANDLE_TYPE_EVENT)
|
|
{
|
|
fd = ((WINPR_EVENT*) Object)->pipe_fd[0];
|
|
}
|
|
else if (Type == HANDLE_TYPE_SEMAPHORE)
|
|
{
|
|
fd = ((WINPR_SEMAPHORE*) Object)->pipe_fd[0];
|
|
}
|
|
else if (Type == HANDLE_TYPE_TIMER)
|
|
{
|
|
WINPR_TIMER* timer = (WINPR_TIMER*) Object;
|
|
fd = timer->fd;
|
|
}
|
|
else if (Type == HANDLE_TYPE_NAMED_PIPE)
|
|
{
|
|
WINPR_NAMED_PIPE* pipe = (WINPR_NAMED_PIPE*) Object;
|
|
fd = (pipe->ServerMode) ? pipe->serverfd : pipe->clientfd;
|
|
}
|
|
|
|
if (FD_ISSET(fd, &fds))
|
|
{
|
|
if (Type == HANDLE_TYPE_SEMAPHORE)
|
|
{
|
|
int length;
|
|
|
|
length = read(fd, &length, 1);
|
|
|
|
if (length != 1)
|
|
{
|
|
fprintf(stderr, "WaitForMultipleObjects: semaphore read() failure [%d] %s\n", errno, strerror(errno));
|
|
return WAIT_FAILED;
|
|
}
|
|
}
|
|
else if (Type == HANDLE_TYPE_TIMER)
|
|
{
|
|
int length;
|
|
UINT64 expirations;
|
|
|
|
length = read(fd, (void*) &expirations, sizeof(UINT64));
|
|
|
|
if (length != 8)
|
|
{
|
|
if (length == -1)
|
|
{
|
|
if (errno == ETIMEDOUT)
|
|
return WAIT_TIMEOUT;
|
|
|
|
fprintf(stderr, "WaitForMultipleObjects: timer read() failure [%d] %s\n", errno, strerror(errno));
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "WaitForMultipleObjects: timer read() failure - incorrect number of bytes read");
|
|
}
|
|
|
|
return WAIT_FAILED;
|
|
}
|
|
}
|
|
|
|
return (WAIT_OBJECT_0 + index);
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "WaitForMultipleObjects: failed (unknown error)\n");
|
|
return WAIT_FAILED;
|
|
}
|
|
|
|
DWORD WaitForMultipleObjectsEx(DWORD nCount, const HANDLE* lpHandles, BOOL bWaitAll, DWORD dwMilliseconds, BOOL bAlertable)
|
|
{
|
|
fprintf(stderr, "[ERROR] %s: Function not implemented.\n", __func__);
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
|
|
DWORD SignalObjectAndWait(HANDLE hObjectToSignal, HANDLE hObjectToWaitOn, DWORD dwMilliseconds, BOOL bAlertable)
|
|
{
|
|
fprintf(stderr, "[ERROR] %s: Function not implemented.\n", __func__);
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|