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- //
- // Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions
- // are met:
- //
- // Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- //
- // Redistributions in binary form must reproduce the above
- // copyright notice, this list of conditions and the following
- // disclaimer in the documentation and/or other materials provided
- // with the distribution.
- //
- // Neither the name of 3Dlabs Inc. Ltd. nor the names of its
- // contributors may be used to endorse or promote products derived
- // from this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- // POSSIBILITY OF SUCH DAMAGE.
- //
- #define SH_EXPORTING
- #include <cassert>
- #include "InitializeDll.h"
- #include "../glslang/Include/InitializeGlobals.h"
- #include "../glslang/Public/ShaderLang.h"
- #include "../glslang/Include/PoolAlloc.h"
- namespace glslang {
- OS_TLSIndex ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
- // Per-process initialization.
- // Needs to be called at least once before parsing, etc. is done.
- // Will also do thread initialization for the calling thread; other
- // threads will need to do that explicitly.
- bool InitProcess()
- {
- glslang::GetGlobalLock();
- if (ThreadInitializeIndex != OS_INVALID_TLS_INDEX) {
- //
- // Function is re-entrant.
- //
- glslang::ReleaseGlobalLock();
- return true;
- }
- ThreadInitializeIndex = OS_AllocTLSIndex();
- if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX) {
- assert(0 && "InitProcess(): Failed to allocate TLS area for init flag");
- glslang::ReleaseGlobalLock();
- return false;
- }
- if (! InitializePoolIndex()) {
- assert(0 && "InitProcess(): Failed to initialize global pool");
- glslang::ReleaseGlobalLock();
- return false;
- }
- if (! InitThread()) {
- assert(0 && "InitProcess(): Failed to initialize thread");
- glslang::ReleaseGlobalLock();
- return false;
- }
- glslang::ReleaseGlobalLock();
- return true;
- }
- // Per-thread scoped initialization.
- // Must be called at least once by each new thread sharing the
- // symbol tables, etc., needed to parse.
- bool InitThread()
- {
- //
- // This function is re-entrant
- //
- if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX) {
- assert(0 && "InitThread(): Process hasn't been initalised.");
- return false;
- }
- if (OS_GetTLSValue(ThreadInitializeIndex) != 0)
- return true;
- if (! OS_SetTLSValue(ThreadInitializeIndex, (void *)1)) {
- assert(0 && "InitThread(): Unable to set init flag.");
- return false;
- }
- glslang::SetThreadPoolAllocator(nullptr);
- return true;
- }
- // Not necessary to call this: InitThread() is reentrant, and the need
- // to do per thread tear down has been removed.
- //
- // This is kept, with memory management removed, to satisfy any exiting
- // calls to it that rely on it.
- bool DetachThread()
- {
- bool success = true;
- if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
- return true;
- //
- // Function is re-entrant and this thread may not have been initialized.
- //
- if (OS_GetTLSValue(ThreadInitializeIndex) != 0) {
- if (!OS_SetTLSValue(ThreadInitializeIndex, (void *)0)) {
- assert(0 && "DetachThread(): Unable to clear init flag.");
- success = false;
- }
- }
- return success;
- }
- // Not necessary to call this: InitProcess() is reentrant.
- //
- // This is kept, with memory management removed, to satisfy any exiting
- // calls to it that rely on it.
- //
- // Users of glslang should call shFinalize() or glslang::FinalizeProcess() for
- // process-scoped memory tear down.
- bool DetachProcess()
- {
- bool success = true;
- if (ThreadInitializeIndex == OS_INVALID_TLS_INDEX)
- return true;
- success = DetachThread();
- OS_FreeTLSIndex(ThreadInitializeIndex);
- ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
- return success;
- }
- } // end namespace glslang
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