system_utils_win.cpp

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Author : Jamie Madill
Date : 2019-01-03 15:24:22
Hash : 1f56ed2a
Message : Add WGLWindow and WGL test configs. WGLWindow lets us use a Windows driver's bindings instead of ANGLE. This only works if the underlying driver supports OpenGL ES compatibility. Also adds the WGL headers, WGL XML, and a specialized WGL loader. Because of a small driver issue with NVIDIA I added a retry for the WGL Window initialization. Bug: angleproject:2995 Change-Id: Ie5148ece470dd03df33015f4919ad1fa79a859ec Reviewed-on: https://chromium-review.googlesource.com/c/1366021 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

src/common/system_utils_win.cpp

//
// Copyright (c) 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.
//

// system_utils_win.cpp: Implementation of OS-specific functions for Windows

#include "system_utils.h"

#include <stdarg.h>
#include <windows.h>
#include <array>
#include <vector>

namespace angle
{

namespace
{

std::string GetExecutablePathImpl()
{
    std::array<char, MAX_PATH> executableFileBuf;
    DWORD executablePathLen = GetModuleFileNameA(nullptr, executableFileBuf.data(),
                                                 static_cast<DWORD>(executableFileBuf.size()));
    return (executablePathLen > 0 ? std::string(executableFileBuf.data()) : "");
}

std::string GetExecutableDirectoryImpl()
{
    std::string executablePath = GetExecutablePath();
    size_t lastPathSepLoc      = executablePath.find_last_of("\\/");
    return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : "";
}

}  // anonymous namespace

const char *GetExecutablePath()
{
    // TODO(jmadill): Make global static string thread-safe.
    const static std::string &exePath = GetExecutablePathImpl();
    return exePath.c_str();
}

const char *GetExecutableDirectory()
{
    // TODO(jmadill): Make global static string thread-safe.
    const static std::string &exeDir = GetExecutableDirectoryImpl();
    return exeDir.c_str();
}

const char *GetSharedLibraryExtension()
{
    return "dll";
}

Optional<std::string> GetCWD()
{
    std::array<char, MAX_PATH> pathBuf;
    DWORD result = GetCurrentDirectoryA(static_cast<DWORD>(pathBuf.size()), pathBuf.data());
    if (result == 0)
    {
        return Optional<std::string>::Invalid();
    }
    return std::string(pathBuf.data());
}

bool SetCWD(const char *dirName)
{
    return (SetCurrentDirectoryA(dirName) == TRUE);
}

bool UnsetEnvironmentVar(const char *variableName)
{
    return (SetEnvironmentVariableA(variableName, nullptr) == TRUE);
}

bool SetEnvironmentVar(const char *variableName, const char *value)
{
    return (SetEnvironmentVariableA(variableName, value) == TRUE);
}

std::string GetEnvironmentVar(const char *variableName)
{
    std::array<char, MAX_PATH> oldValue;
    DWORD result =
        GetEnvironmentVariableA(variableName, oldValue.data(), static_cast<DWORD>(oldValue.size()));
    if (result == 0)
    {
        return std::string();
    }
    else
    {
        return std::string(oldValue.data());
    }
}

const char *GetPathSeparator()
{
    return ";";
}

class Win32Library : public Library
{
  public:
    Win32Library(const char *libraryName)
    {
        char buffer[MAX_PATH];
        int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
        if (ret > 0 && ret < MAX_PATH)
        {
            mModule = LoadLibraryA(buffer);
        }
    }

    ~Win32Library() override
    {
        if (mModule)
        {
            FreeLibrary(mModule);
        }
    }

    void *getSymbol(const char *symbolName) override
    {
        if (!mModule)
        {
            return nullptr;
        }

        return reinterpret_cast<void *>(GetProcAddress(mModule, symbolName));
    }

    void *getNative() const override { return reinterpret_cast<void *>(mModule); }

  private:
    HMODULE mModule = nullptr;
};

Library *OpenSharedLibrary(const char *libraryName)
{
    return new Win32Library(libraryName);
}
}  // namespace angle

kc3-lang/angle/src/common/system_utils_win.cpp

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kc3-lang/angle /src/common/system_utils_win.cpp