mirror of
https://github.com/bevyengine/bevy
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155 lines
4 KiB
C++
155 lines
4 KiB
C++
//
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// Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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#define SH_EXPORTING
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#include <cassert>
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#include "InitializeDll.h"
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#include "../glslang/Include/InitializeGlobals.h"
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#include "../glslang/Public/ShaderLang.h"
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namespace glslang {
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OS_TLSIndex ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
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bool InitProcess()
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{
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glslang::GetGlobalLock();
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if (ThreadInitializeIndex != OS_INVALID_TLS_INDEX) {
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//
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// Function is re-entrant.
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//
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glslang::ReleaseGlobalLock();
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return true;
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}
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ThreadInitializeIndex = OS_AllocTLSIndex();
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if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX) {
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assert(0 && "InitProcess(): Failed to allocate TLS area for init flag");
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glslang::ReleaseGlobalLock();
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return false;
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}
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if (! InitializePoolIndex()) {
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assert(0 && "InitProcess(): Failed to initialize global pool");
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glslang::ReleaseGlobalLock();
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return false;
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}
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if (! InitThread()) {
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assert(0 && "InitProcess(): Failed to initialize thread");
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glslang::ReleaseGlobalLock();
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return false;
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}
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glslang::ReleaseGlobalLock();
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return true;
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}
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bool InitThread()
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{
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//
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// This function is re-entrant
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//
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if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX) {
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assert(0 && "InitThread(): Process hasn't been initalised.");
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return false;
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}
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if (OS_GetTLSValue(ThreadInitializeIndex) != 0)
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return true;
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InitializeMemoryPools();
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if (! OS_SetTLSValue(ThreadInitializeIndex, (void *)1)) {
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assert(0 && "InitThread(): Unable to set init flag.");
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return false;
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}
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return true;
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}
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bool DetachThread()
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{
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bool success = true;
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if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
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return true;
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//
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// Function is re-entrant and this thread may not have been initialized.
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//
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if (OS_GetTLSValue(ThreadInitializeIndex) != 0) {
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if (!OS_SetTLSValue(ThreadInitializeIndex, (void *)0)) {
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assert(0 && "DetachThread(): Unable to clear init flag.");
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success = false;
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}
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FreeGlobalPools();
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}
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return success;
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}
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bool DetachProcess()
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{
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bool success = true;
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if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
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return true;
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ShFinalize();
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success = DetachThread();
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FreePoolIndex();
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OS_FreeTLSIndex(ThreadInitializeIndex);
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ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
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return success;
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}
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} // end namespace glslang
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