| // |
| // Copyright 2014 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // global_state.cpp : Implements functions for querying the thread-local GL and EGL state. |
| |
| #include "libGLESv2/global_state.h" |
| |
| #include "common/debug.h" |
| #include "common/platform.h" |
| #include "common/system_utils.h" |
| #include "libANGLE/ErrorStrings.h" |
| #include "libANGLE/Thread.h" |
| #include "libGLESv2/resource.h" |
| |
| #include <atomic> |
| |
| namespace egl |
| { |
| namespace |
| { |
| ANGLE_REQUIRE_CONSTANT_INIT std::atomic<angle::GlobalMutex *> g_Mutex(nullptr); |
| static_assert(std::is_trivially_destructible<decltype(g_Mutex)>::value, |
| "global mutex is not trivially destructible"); |
| |
| ANGLE_REQUIRE_CONSTANT_INIT gl::Context *g_LastContext(nullptr); |
| static_assert(std::is_trivially_destructible<decltype(g_LastContext)>::value, |
| "global last context is not trivially destructible"); |
| |
| void SetContextToAndroidOpenGLTLSSlot(gl::Context *value) |
| { |
| #if defined(ANGLE_PLATFORM_ANDROID) |
| if (angle::gUseAndroidOpenGLTlsSlot) |
| { |
| ANGLE_ANDROID_GET_GL_TLS()[angle::kAndroidOpenGLTlsSlot] = static_cast<void *>(value); |
| } |
| #endif |
| } |
| |
| Thread *AllocateCurrentThread() |
| { |
| { |
| // Global thread intentionally leaked |
| ANGLE_SCOPED_DISABLE_LSAN(); |
| gCurrentThread = new Thread(); |
| } |
| |
| // Initialize fast TLS slot |
| SetContextToAndroidOpenGLTLSSlot(nullptr); |
| gl::gCurrentValidContext = nullptr; |
| |
| return gCurrentThread; |
| } |
| |
| void AllocateMutex() |
| { |
| if (g_Mutex == nullptr) |
| { |
| std::unique_ptr<angle::GlobalMutex> newMutex(new angle::GlobalMutex()); |
| angle::GlobalMutex *expected = nullptr; |
| if (g_Mutex.compare_exchange_strong(expected, newMutex.get())) |
| { |
| newMutex.release(); |
| } |
| } |
| } |
| |
| } // anonymous namespace |
| |
| thread_local Thread *gCurrentThread = nullptr; |
| |
| angle::GlobalMutex &GetGlobalMutex() |
| { |
| AllocateMutex(); |
| return *g_Mutex; |
| } |
| |
| gl::Context *GetGlobalLastContext() |
| { |
| return g_LastContext; |
| } |
| |
| void SetGlobalLastContext(gl::Context *context) |
| { |
| g_LastContext = context; |
| } |
| |
| Thread *GetCurrentThread() |
| { |
| Thread *current = gCurrentThread; |
| return (current ? current : AllocateCurrentThread()); |
| } |
| |
| void SetContextCurrent(Thread *thread, gl::Context *context) |
| { |
| ASSERT(gCurrentThread); |
| gCurrentThread->setCurrent(context); |
| SetContextToAndroidOpenGLTLSSlot(context); |
| gl::gCurrentValidContext = context; |
| #if defined(ANGLE_FORCE_CONTEXT_CHECK_EVERY_CALL) |
| DirtyContextIfNeeded(context); |
| #endif |
| } |
| |
| } // namespace egl |
| |
| namespace gl |
| { |
| void GenerateContextLostErrorOnContext(Context *context) |
| { |
| if (context && context->isContextLost()) |
| { |
| context->validationError(GL_CONTEXT_LOST, err::kContextLost); |
| } |
| } |
| |
| void GenerateContextLostErrorOnCurrentGlobalContext() |
| { |
| GenerateContextLostErrorOnContext(GetGlobalContext()); |
| } |
| } // namespace gl |
| |
| #if defined(ANGLE_PLATFORM_WINDOWS) && !defined(ANGLE_STATIC) |
| namespace egl |
| { |
| |
| namespace |
| { |
| void DeallocateCurrentThread() |
| { |
| SafeDelete(gCurrentThread); |
| } |
| |
| void DeallocateMutex() |
| { |
| angle::GlobalMutex *mutex = g_Mutex.exchange(nullptr); |
| { |
| // Wait for the mutex to become released by other threads before deleting. |
| std::lock_guard<angle::GlobalMutex> lock(*mutex); |
| } |
| SafeDelete(mutex); |
| } |
| |
| bool InitializeProcess() |
| { |
| EnsureDebugAllocated(); |
| AllocateMutex(); |
| return AllocateCurrentThread() != nullptr; |
| } |
| |
| void TerminateProcess() |
| { |
| DeallocateDebug(); |
| DeallocateMutex(); |
| DeallocateCurrentThread(); |
| } |
| |
| } // anonymous namespace |
| |
| } // namespace egl |
| |
| namespace |
| { |
| // The following WaitForDebugger code is based on SwiftShader. See: |
| // https://cs.chromium.org/chromium/src/third_party/swiftshader/src/Vulkan/main.cpp |
| # if defined(ANGLE_ENABLE_ASSERTS) && !defined(ANGLE_ENABLE_WINDOWS_UWP) |
| INT_PTR CALLBACK DebuggerWaitDialogProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) |
| { |
| RECT rect; |
| |
| switch (uMsg) |
| { |
| case WM_INITDIALOG: |
| ::GetWindowRect(GetDesktopWindow(), &rect); |
| ::SetWindowPos(hwnd, HWND_TOP, rect.right / 2, rect.bottom / 2, 0, 0, SWP_NOSIZE); |
| ::SetTimer(hwnd, 1, 100, NULL); |
| return TRUE; |
| case WM_COMMAND: |
| if (LOWORD(wParam) == IDCANCEL) |
| { |
| ::EndDialog(hwnd, 0); |
| } |
| break; |
| case WM_TIMER: |
| if (angle::IsDebuggerAttached()) |
| { |
| ::EndDialog(hwnd, 0); |
| } |
| } |
| |
| return FALSE; |
| } |
| |
| void WaitForDebugger(HINSTANCE instance) |
| { |
| if (angle::IsDebuggerAttached()) |
| return; |
| |
| HRSRC dialog = ::FindResourceA(instance, MAKEINTRESOURCEA(IDD_DIALOG1), MAKEINTRESOURCEA(5)); |
| if (!dialog) |
| { |
| printf("Error finding wait for debugger dialog. Error %lu.\n", ::GetLastError()); |
| return; |
| } |
| |
| DLGTEMPLATE *dialogTemplate = reinterpret_cast<DLGTEMPLATE *>(::LoadResource(instance, dialog)); |
| ::DialogBoxIndirectA(instance, dialogTemplate, NULL, DebuggerWaitDialogProc); |
| } |
| # else |
| void WaitForDebugger(HINSTANCE instance) {} |
| # endif // defined(ANGLE_ENABLE_ASSERTS) && !defined(ANGLE_ENABLE_WINDOWS_UWP) |
| } // namespace |
| |
| extern "C" BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID) |
| { |
| switch (reason) |
| { |
| case DLL_PROCESS_ATTACH: |
| if (angle::GetEnvironmentVar("ANGLE_WAIT_FOR_DEBUGGER") == "1") |
| { |
| WaitForDebugger(instance); |
| } |
| return static_cast<BOOL>(egl::InitializeProcess()); |
| |
| case DLL_THREAD_ATTACH: |
| return static_cast<BOOL>(egl::AllocateCurrentThread() != nullptr); |
| |
| case DLL_THREAD_DETACH: |
| egl::DeallocateCurrentThread(); |
| break; |
| |
| case DLL_PROCESS_DETACH: |
| egl::TerminateProcess(); |
| break; |
| } |
| |
| return TRUE; |
| } |
| #endif // defined(ANGLE_PLATFORM_WINDOWS) && !defined(ANGLE_STATIC) |