27c439675f
Depending on the windows target version (_WIN32_WINNT), the used SDK and the build configuration the linker will see multiple libraries exporting the same symbols. To prevent ugly hacks (e.g. modifying cmake's default system libraries or fragile library linking order chains) we prefix these functions with "winpr_" and create corresponding defines to keep the current api names.
96 lines
2.2 KiB
C
96 lines
2.2 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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* Copyright 2014 Thincast Technologies GmbH
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* Copyright 2014 Norbert Federa <norbert.federa@thincast.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 <winpr/synch.h>
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#include <winpr/interlocked.h>
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#include "../log.h"
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#define TAG WINPR_TAG("sync")
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#if (!defined(_WIN32)) || (defined(_WIN32) && (_WIN32_WINNT < 0x0600))
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BOOL winpr_InitOnceBeginInitialize(LPINIT_ONCE lpInitOnce, DWORD dwFlags, PBOOL fPending, LPVOID* lpContext)
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{
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WLog_ERR(TAG, "not implemented");
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return FALSE;
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}
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BOOL winpr_InitOnceComplete(LPINIT_ONCE lpInitOnce, DWORD dwFlags, LPVOID lpContext)
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{
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WLog_ERR(TAG, "not implemented");
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return FALSE;
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}
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VOID winpr_InitOnceInitialize(PINIT_ONCE InitOnce)
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{
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WLog_ERR(TAG, "not implemented");
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}
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BOOL winpr_InitOnceExecuteOnce(PINIT_ONCE InitOnce, PINIT_ONCE_FN InitFn, PVOID Parameter, LPVOID* Context)
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{
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for (;;)
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{
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switch ((ULONG_PTR)InitOnce->Ptr & 3)
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{
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case 2:
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/* already completed successfully */
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return TRUE;
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case 0:
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/* first time */
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if (InterlockedCompareExchangePointer(&InitOnce->Ptr, (PVOID)1, (PVOID)0) != (PVOID)0)
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{
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/* some other thread was faster */
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break;
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}
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/* it's our job to call the init function */
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if (InitFn(InitOnce, Parameter, Context))
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{
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/* success */
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InitOnce->Ptr = (PVOID)2;
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return TRUE;
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}
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/* the init function returned an error, reset the status */
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InitOnce->Ptr = (PVOID)0;
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return FALSE;
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case 1:
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/* in progress */
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break;
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default:
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WLog_ERR(TAG, "internal error");
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return FALSE;
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}
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Sleep(5);
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}
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}
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#endif
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