717 lines
14 KiB
C
717 lines
14 KiB
C
/**
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* WinPR: Windows Portable Runtime
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* Process Thread 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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#include <assert.h>
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#include <winpr/handle.h>
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#include <winpr/thread.h>
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/**
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* api-ms-win-core-processthreads-l1-1-1.dll
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*
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* CreateRemoteThread
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* CreateRemoteThreadEx
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* CreateThread
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* DeleteProcThreadAttributeList
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* ExitThread
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* FlushInstructionCache
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* FlushProcessWriteBuffers
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* GetCurrentThread
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* GetCurrentThreadId
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* GetCurrentThreadStackLimits
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* GetExitCodeThread
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* GetPriorityClass
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* GetStartupInfoW
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* GetThreadContext
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* GetThreadId
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* GetThreadIdealProcessorEx
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* GetThreadPriority
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* GetThreadPriorityBoost
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* GetThreadTimes
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* InitializeProcThreadAttributeList
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* OpenThread
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* OpenThreadToken
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* QueryProcessAffinityUpdateMode
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* QueueUserAPC
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* ResumeThread
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* SetPriorityClass
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* SetThreadContext
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* SetThreadPriority
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* SetThreadPriorityBoost
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* SetThreadStackGuarantee
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* SetThreadToken
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* SuspendThread
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* SwitchToThread
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* TerminateThread
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* UpdateProcThreadAttribute
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*/
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#ifndef _WIN32
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#include <winpr/crt.h>
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#include <winpr/platform.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_EVENTFD_H
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#include <sys/eventfd.h>
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#endif
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#include <winpr/debug.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <winpr/collections.h>
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#include "thread.h"
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#include "../handle/handle.h"
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#include "../log.h"
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#define TAG WINPR_TAG("thread")
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static wListDictionary* thread_list = NULL;
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static BOOL ThreadCloseHandle(HANDLE handle);
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static void cleanup_handle(void* obj);
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static BOOL ThreadIsHandled(HANDLE handle)
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{
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WINPR_THREAD* pThread = (WINPR_THREAD*) handle;
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if (!pThread || (pThread->Type != HANDLE_TYPE_THREAD))
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{
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SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
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}
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return TRUE;
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}
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static int ThreadGetFd(HANDLE handle)
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{
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WINPR_THREAD* pThread = (WINPR_THREAD*) handle;
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if (!ThreadIsHandled(handle))
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return -1;
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return pThread->pipe_fd[0];
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}
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static DWORD ThreadCleanupHandle(HANDLE handle)
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{
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WINPR_THREAD* thread = (WINPR_THREAD*) handle;
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if (!ThreadIsHandled(handle))
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return WAIT_FAILED;
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pthread_mutex_lock(&thread->mutex);
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if (!thread->joined)
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{
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int status;
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status = pthread_join(thread->thread, NULL);
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if (status != 0)
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{
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WLog_ERR(TAG, "pthread_join failure: [%d] %s",
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status, strerror(status));
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pthread_mutex_unlock(&thread->mutex);
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return WAIT_FAILED;
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}
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else
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thread->joined = TRUE;
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}
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pthread_mutex_unlock(&thread->mutex);
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return WAIT_OBJECT_0;
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}
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static HANDLE_OPS ops = {
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ThreadIsHandled,
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ThreadCloseHandle,
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ThreadGetFd,
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ThreadCleanupHandle
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};
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static void dump_thread(WINPR_THREAD* thread)
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{
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#if defined(WITH_DEBUG_THREADS)
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void* stack = winpr_backtrace(20);
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char** msg;
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size_t used, i;
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WLog_DBG(TAG, "Called from:");
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msg = winpr_backtrace_symbols(stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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winpr_backtrace_free(stack);
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WLog_DBG(TAG, "Thread handle created still not closed!");
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msg = winpr_backtrace_symbols(thread->create_stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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if (thread->started)
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{
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WLog_DBG(TAG, "Thread still running!");
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}
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else if (!thread->exit_stack)
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{
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WLog_DBG(TAG, "Thread suspended.");
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}
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else
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{
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WLog_DBG(TAG, "Thread exited at:");
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msg = winpr_backtrace_symbols(thread->exit_stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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}
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#endif
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}
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/**
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* TODO: implement thread suspend/resume using pthreads
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* http://stackoverflow.com/questions/3140867/suspend-pthreads-without-using-condition
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*/
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static BOOL set_event(WINPR_THREAD *thread)
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{
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int length;
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BOOL status = FALSE;
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#ifdef HAVE_EVENTFD_H
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eventfd_t val = 1;
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do
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{
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length = eventfd_write(thread->pipe_fd[0], val);
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}
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while ((length < 0) && (errno == EINTR));
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status = (length == 0) ? TRUE : FALSE;
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#else
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if (WaitForSingleObject(thread, 0) != WAIT_OBJECT_0)
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{
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length = write(thread->pipe_fd[1], "-", 1);
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if (length == 1)
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status = TRUE;
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}
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else
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{
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status = TRUE;
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}
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#endif
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return status;
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}
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static BOOL reset_event(WINPR_THREAD *thread)
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{
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int length;
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BOOL status = FALSE;
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#ifdef HAVE_EVENTFD_H
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eventfd_t value;
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do
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{
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length = eventfd_read(thread->pipe_fd[0], &value);
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}
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while ((length < 0) && (errno == EINTR));
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if ((length > 0) && (!status))
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status = TRUE;
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#else
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length = read(thread->pipe_fd[0], &length, 1);
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if ((length == 1) && (!status))
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status = TRUE;
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#endif
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return status;
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}
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static BOOL thread_compare(void* a, void* b)
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{
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pthread_t* p1 = a;
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pthread_t* p2 = b;
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BOOL rc = pthread_equal(*p1, *p2);
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return rc;
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}
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/* Thread launcher function responsible for registering
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* cleanup handlers and calling pthread_exit, if not done
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* in thread function. */
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static void* thread_launcher(void* arg)
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{
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DWORD res = -1;
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void* rc = NULL;
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WINPR_THREAD* thread = (WINPR_THREAD*) arg;
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if (!thread)
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{
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WLog_ERR(TAG, "Called with invalid argument %p", arg);
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goto exit;
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}
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else
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{
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void *(*fkt)(void*) = (void*) thread->lpStartAddress;
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if (!fkt)
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{
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WLog_ERR(TAG, "Thread function argument is %p", fkt);
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goto exit;
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}
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rc = fkt(thread->lpParameter);
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}
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exit:
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if (thread)
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{
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if (!thread->exited)
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thread->dwExitCode = (DWORD)(size_t)rc;
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set_event(thread);
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res = thread->dwExitCode;
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if (thread->detached || !thread->started)
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cleanup_handle(thread);
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}
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pthread_exit((void*) (size_t) res);
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return rc;
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}
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static void winpr_StartThread(WINPR_THREAD *thread)
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{
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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if (thread->dwStackSize > 0)
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pthread_attr_setstacksize(&attr, (size_t) thread->dwStackSize);
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thread->started = TRUE;
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reset_event(thread);
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pthread_create(&thread->thread, &attr, thread_launcher, thread);
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ListDictionary_Add(thread_list, &thread->thread, thread);
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pthread_attr_destroy(&attr);
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dump_thread(thread);
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}
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HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize,
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LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId)
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{
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HANDLE handle;
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WINPR_THREAD* thread;
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thread = (WINPR_THREAD*) calloc(1, sizeof(WINPR_THREAD));
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if (!thread)
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return NULL;
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thread->dwStackSize = dwStackSize;
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thread->lpParameter = lpParameter;
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thread->lpStartAddress = lpStartAddress;
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thread->lpThreadAttributes = lpThreadAttributes;
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thread->ops = &ops;
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#if defined(WITH_DEBUG_THREADS)
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thread->create_stack = winpr_backtrace(20);
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dump_thread(thread);
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#endif
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#ifdef HAVE_EVENTFD_H
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thread->pipe_fd[0] = eventfd(0, EFD_NONBLOCK);
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if (thread->pipe_fd[0] < 0)
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{
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WLog_ERR(TAG, "failed to create thread");
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free(thread);
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return NULL;
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}
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#else
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if (pipe(thread->pipe_fd) < 0)
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{
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WLog_ERR(TAG, "failed to create thread");
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free(thread);
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return NULL;
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}
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{
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int flags = fcntl(thread->pipe_fd[0], F_GETFL);
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fcntl(thread->pipe_fd[0], F_SETFL, flags | O_NONBLOCK);
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}
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#endif
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if(pthread_mutex_init(&thread->mutex, 0) != 0)
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{
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WLog_ERR(TAG, "failed to initialize thread mutex");
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if (thread->pipe_fd[0])
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close(thread->pipe_fd[0]);
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if (thread->pipe_fd[1])
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close(thread->pipe_fd[1]);
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free(thread);
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return NULL;
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}
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WINPR_HANDLE_SET_TYPE(thread, HANDLE_TYPE_THREAD);
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handle = (HANDLE) thread;
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if (!thread_list)
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{
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thread_list = ListDictionary_New(TRUE);
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if (!thread_list)
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{
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WLog_ERR(TAG, "Couldn't create global thread list");
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if (thread->pipe_fd[0])
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close(thread->pipe_fd[0]);
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if (thread->pipe_fd[1])
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close(thread->pipe_fd[1]);
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free(thread);
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return NULL;
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}
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thread_list->objectKey.fnObjectEquals = thread_compare;
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}
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if (!(dwCreationFlags & CREATE_SUSPENDED))
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winpr_StartThread(thread);
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else
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set_event(thread);
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return handle;
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}
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void cleanup_handle(void *obj)
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{
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WINPR_THREAD* thread = (WINPR_THREAD*) obj;
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int rc = pthread_mutex_destroy(&thread->mutex);
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if (rc)
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WLog_ERR(TAG, "failed to destroy mutex [%d] %s (%d)",
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rc, strerror(errno), errno);
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if (thread->pipe_fd[0])
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close(thread->pipe_fd[0]);
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if (thread->pipe_fd[1])
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close(thread->pipe_fd[1]);
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if (thread_list && ListDictionary_Contains(thread_list, &thread->thread))
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ListDictionary_Remove(thread_list, &thread->thread);
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#if defined(WITH_DEBUG_THREADS)
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if (thread->create_stack)
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winpr_backtrace_free(thread->create_stack);
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if (thread->exit_stack)
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winpr_backtrace_free(thread->exit_stack);
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#endif
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free(thread);
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}
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BOOL ThreadCloseHandle(HANDLE handle)
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{
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WINPR_THREAD* thread = (WINPR_THREAD*) handle;
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if (!thread_list)
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{
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WLog_ERR(TAG, "Thread list does not exist, check call!");
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dump_thread(thread);
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}
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else if (!ListDictionary_Contains(thread_list, &thread->thread))
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{
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WLog_ERR(TAG, "Thread list does not contain this thread! check call!");
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dump_thread(thread);
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}
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else
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{
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ListDictionary_Lock(thread_list);
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dump_thread(thread);
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if ((thread->started) && (WaitForSingleObject(thread, 0) != WAIT_OBJECT_0))
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{
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WLog_ERR(TAG, "Thread running, setting to detached state!");
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thread->detached = TRUE;
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pthread_detach(thread->thread);
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}
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else
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{
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cleanup_handle(thread);
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}
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ListDictionary_Unlock(thread_list);
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if (ListDictionary_Count(thread_list) < 1)
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{
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ListDictionary_Free(thread_list);
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thread_list = NULL;
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}
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}
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return TRUE;
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}
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HANDLE CreateRemoteThread(HANDLE hProcess, LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize,
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LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId)
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{
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WLog_ERR(TAG, "not implemented");
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return NULL;
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}
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VOID ExitThread(DWORD dwExitCode)
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{
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DWORD rc;
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pthread_t tid = pthread_self();
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if (!thread_list)
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{
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WLog_ERR(TAG, "function called without existing thread list!");
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#if defined(WITH_DEBUG_THREADS)
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DumpThreadHandles();
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#endif
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pthread_exit(0);
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}
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else if (!ListDictionary_Contains(thread_list, &tid))
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{
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WLog_ERR(TAG, "function called, but no matching entry in thread list!");
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#if defined(WITH_DEBUG_THREADS)
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DumpThreadHandles();
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#endif
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pthread_exit(0);
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}
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else
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{
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WINPR_THREAD* thread;
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ListDictionary_Lock(thread_list);
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thread = ListDictionary_GetItemValue(thread_list, &tid);
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assert(thread);
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thread->exited = TRUE;
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thread->dwExitCode = dwExitCode;
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#if defined(WITH_DEBUG_THREADS)
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thread->exit_stack = winpr_backtrace(20);
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#endif
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ListDictionary_Unlock(thread_list);
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set_event(thread);
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rc = thread->dwExitCode;
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if (thread->detached || !thread->started)
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cleanup_handle(thread);
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pthread_exit((void*) (size_t) rc);
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}
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}
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BOOL GetExitCodeThread(HANDLE hThread, LPDWORD lpExitCode)
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{
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ULONG Type;
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PVOID Object;
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WINPR_THREAD* thread;
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if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
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return FALSE;
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thread = (WINPR_THREAD*) Object;
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*lpExitCode = thread->dwExitCode;
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return TRUE;
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}
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HANDLE _GetCurrentThread(VOID)
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{
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HANDLE hdl = NULL;
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pthread_t tid = pthread_self();
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if (!thread_list)
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{
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WLog_ERR(TAG, "function called without existing thread list!");
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#if defined(WITH_DEBUG_THREADS)
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DumpThreadHandles();
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#endif
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}
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else if (!ListDictionary_Contains(thread_list, &tid))
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{
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WLog_ERR(TAG, "function called, but no matching entry in thread list!");
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#if defined(WITH_DEBUG_THREADS)
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DumpThreadHandles();
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#endif
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}
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else
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{
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hdl = ListDictionary_GetItemValue(thread_list, &tid);
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}
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return hdl;
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}
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DWORD GetCurrentThreadId(VOID)
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{
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pthread_t tid;
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tid = pthread_self();
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/* Since pthread_t can be 64-bits on some systems, take just the lower */
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/* 32-bits of it for the thread ID returned by this function. */
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return (DWORD) (tid && 0xffffffff);
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}
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DWORD ResumeThread(HANDLE hThread)
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{
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ULONG Type;
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PVOID Object;
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WINPR_THREAD *thread;
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|
|
|
if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
|
|
return 0;
|
|
|
|
thread = (WINPR_THREAD*) Object;
|
|
pthread_mutex_lock(&thread->mutex);
|
|
|
|
if (!thread->started)
|
|
winpr_StartThread(thread);
|
|
else
|
|
WLog_WARN(TAG, "Thread already started!");
|
|
|
|
pthread_mutex_unlock(&thread->mutex);
|
|
return 0;
|
|
}
|
|
|
|
DWORD SuspendThread(HANDLE hThread)
|
|
{
|
|
WLog_ERR(TAG, "Function not implemented!");
|
|
return 0;
|
|
}
|
|
|
|
BOOL SwitchToThread(VOID)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL TerminateThread(HANDLE hThread, DWORD dwExitCode)
|
|
{
|
|
ULONG Type;
|
|
PVOID Object;
|
|
WINPR_THREAD* thread;
|
|
|
|
if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
|
|
return 0;
|
|
|
|
thread = (WINPR_THREAD*) Object;
|
|
thread->exited = TRUE;
|
|
thread->dwExitCode = dwExitCode;
|
|
pthread_mutex_lock(&thread->mutex);
|
|
#ifndef ANDROID
|
|
pthread_cancel(thread->thread);
|
|
#else
|
|
WLog_ERR(TAG, "Function not supported on this platform!");
|
|
#endif
|
|
pthread_mutex_unlock(&thread->mutex);
|
|
set_event(thread);
|
|
return TRUE;
|
|
}
|
|
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
VOID DumpThreadHandles(void)
|
|
{
|
|
char** msg;
|
|
size_t used, i;
|
|
void* stack = winpr_backtrace(20);
|
|
WLog_DBG(TAG, "---------------- Called from ----------------------------");
|
|
msg = winpr_backtrace_symbols(stack, &used);
|
|
|
|
for (i = 0; i < used; i++)
|
|
{
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
}
|
|
|
|
free(msg);
|
|
winpr_backtrace_free(stack);
|
|
WLog_DBG(TAG, "---------------- Start Dumping thread handles -----------");
|
|
|
|
if (!thread_list)
|
|
{
|
|
WLog_DBG(TAG, "All threads properly shut down and disposed of.");
|
|
}
|
|
else
|
|
{
|
|
ULONG_PTR *keys = NULL;
|
|
ListDictionary_Lock(thread_list);
|
|
int x, count = ListDictionary_GetKeys(thread_list, &keys);
|
|
WLog_DBG(TAG, "Dumping %d elements", count);
|
|
|
|
for (x = 0; x < count; x++)
|
|
{
|
|
WINPR_THREAD* thread = ListDictionary_GetItemValue(thread_list, (void*) keys[x]);
|
|
WLog_DBG(TAG, "Thread [%d] handle created still not closed!", x);
|
|
msg = winpr_backtrace_symbols(thread->create_stack, &used);
|
|
|
|
for (i = 0; i < used; i++)
|
|
{
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
}
|
|
|
|
free(msg);
|
|
|
|
if (thread->started)
|
|
{
|
|
WLog_DBG(TAG, "Thread [%d] still running!", x);
|
|
}
|
|
else
|
|
{
|
|
WLog_DBG(TAG, "Thread [%d] exited at:", x);
|
|
msg = winpr_backtrace_symbols(thread->exit_stack, &used);
|
|
|
|
for (i=0; i<used; i++)
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
|
|
free(msg);
|
|
}
|
|
}
|
|
|
|
if (keys)
|
|
free(keys);
|
|
|
|
ListDictionary_Unlock(thread_list);
|
|
}
|
|
|
|
WLog_DBG(TAG, "---------------- End Dumping thread handles -------------");
|
|
}
|
|
#endif
|
|
#endif
|
|
|