mirror of https://github.com/axmolengine/axmol.git
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
//========================================================================
|
|
// GLFW 3.4 POSIX - www.glfw.org
|
|
//------------------------------------------------------------------------
|
|
// Copyright (c) 2022 Camilla Löwy <elmindreda@glfw.org>
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
//
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
//
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would
|
|
// be appreciated but is not required.
|
|
//
|
|
// 2. Altered source versions must be plainly marked as such, and must not
|
|
// be misrepresented as being the original software.
|
|
//
|
|
// 3. This notice may not be removed or altered from any source
|
|
// distribution.
|
|
//
|
|
//========================================================================
|
|
// It is fine to use C99 in this file because it will not be built with VS
|
|
//========================================================================
|
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include "internal.h"
|
|
|
|
#if defined(GLFW_BUILD_POSIX_POLL)
|
|
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
|
|
GLFWbool _glfwPollPOSIX(struct pollfd* fds, nfds_t count, double* timeout)
|
|
{
|
|
for (;;)
|
|
{
|
|
if (timeout)
|
|
{
|
|
const uint64_t base = _glfwPlatformGetTimerValue();
|
|
|
|
#if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__)
|
|
const time_t seconds = (time_t) *timeout;
|
|
const long nanoseconds = (long) ((*timeout - seconds) * 1e9);
|
|
const struct timespec ts = { seconds, nanoseconds };
|
|
const int result = ppoll(fds, count, &ts, NULL);
|
|
#elif defined(__NetBSD__)
|
|
const time_t seconds = (time_t) *timeout;
|
|
const long nanoseconds = (long) ((*timeout - seconds) * 1e9);
|
|
const struct timespec ts = { seconds, nanoseconds };
|
|
const int result = pollts(fds, count, &ts, NULL);
|
|
#else
|
|
const int milliseconds = (int) (*timeout * 1e3);
|
|
const int result = poll(fds, count, milliseconds);
|
|
#endif
|
|
const int error = errno; // clock_gettime may overwrite our error
|
|
|
|
*timeout -= (_glfwPlatformGetTimerValue() - base) /
|
|
(double) _glfwPlatformGetTimerFrequency();
|
|
|
|
if (result > 0)
|
|
return GLFW_TRUE;
|
|
else if (result == -1 && error != EINTR && error != EAGAIN)
|
|
return GLFW_FALSE;
|
|
else if (*timeout <= 0.0)
|
|
return GLFW_FALSE;
|
|
}
|
|
else
|
|
{
|
|
const int result = poll(fds, count, -1);
|
|
if (result > 0)
|
|
return GLFW_TRUE;
|
|
else if (result == -1 && errno != EINTR && errno != EAGAIN)
|
|
return GLFW_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif // GLFW_BUILD_POSIX_POLL
|
|
|