posix

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Author : Jamie Madill
Date : 2018-12-29 10:29:33
Hash : ba319ba3
Message : Re-land "Load entry points dynamically in tests and samples." Fixes the Android/ChromeOS/Fuchsia builds by using consistent EGL headers. This CL adds a dynamic loader generator based on XML files. It also refactors the entry point generation script to move the XML parsing into a helper class. Additionally this includes a new GLES 1.0 base header. The new header allows for function pointer types and hiding prototypes. All tests and samples now load ANGLE dynamically. In the future this will be extended to load entry points from the driver directly when possible. This will allow us to perform more accurate A/B testing. The new build configuration leads to some tests having more warnings applied. The CL includes fixes for the new warnings. Bug: angleproject:2995 Change-Id: I5a8772f41a0f89570b3736b785f44b7de1539b57 Reviewed-on: https://chromium-review.googlesource.com/c/1392382 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

Posix_system_utils.cpp

//
// Copyright (c) 2015 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.
//

// Posix_system_utils.cpp: Implementation of OS-specific functions for Posix systems

#include "util/system_utils.h"

#include <dlfcn.h>
#include <sched.h>
#include <sys/resource.h>
#include <time.h>
#include <unistd.h>

namespace angle
{

void Sleep(unsigned int milliseconds)
{
    // On Windows Sleep(0) yields while it isn't guaranteed by Posix's sleep
    // so we replicate Windows' behavior with an explicit yield.
    if (milliseconds == 0)
    {
        sched_yield();
    }
    else
    {
        timespec sleepTime = {
            .tv_sec  = milliseconds / 1000,
            .tv_nsec = (milliseconds % 1000) * 1000000,
        };

        nanosleep(&sleepTime, nullptr);
    }
}

void SetLowPriorityProcess()
{
    setpriority(PRIO_PROCESS, getpid(), 10);
}

void WriteDebugMessage(const char *format, ...)
{
    va_list vararg;
    va_start(vararg, format);
    vfprintf(stderr, format, vararg);
    va_end(vararg);
}

bool StabilizeCPUForBenchmarking()
{
    bool success = true;
    errno        = 0;
    setpriority(PRIO_PROCESS, getpid(), -20);
    if (errno)
    {
        // A friendly warning in case the test was run without appropriate permission.
        perror(
            "Warning: setpriority failed in StabilizeCPUForBenchmarking. Process will retain "
            "default priority");
        success = false;
    }
#if ANGLE_PLATFORM_LINUX
    cpu_set_t affinity;
    CPU_SET(0, &affinity);
    errno = 0;
    if (sched_setaffinity(getpid(), sizeof(affinity), &affinity))
    {
        perror(
            "Warning: sched_setaffinity failed in StabilizeCPUForBenchmarking. Process will retain "
            "default affinity");
        success = false;
    }
#else
    // TODO(jmadill): Implement for non-linux. http://anglebug.com/2923
#endif

    return success;
}
}  // namespace angle

kc3-lang/angle/util/posix

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kc3-lang/angle /util/posix