You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
81 lines
3.1 KiB
81 lines
3.1 KiB
//======================================================================== |
|
// 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" |
|
|
|
#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; |
|
} |
|
} |
|
} |
|
|
|
|