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POSIX: Remove use of deprecated gettimeofday

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POSIX.1-2008 deprecated gettimeofday, which we used as a fallback if the
monotonic clock was unavailable.

This replaces that fallback with the non-monotonic real-time clock.

Because of the Gordian knot of feature test macros across Unices, this
also includes the shift from some platform source files defining
_POSIX_C_SOURCE to various values to _DEFAULT_SOURCE being defined for
all source files on Linux.  This is because -std=c99 on Linux disables
_DEFAULT_SOURCE (POSIX 2008 and extensions).

Once runtime platform selection comes in, this kind of platform-specific
preprocessor logic can be moved into the platform glue files and won't
need to be replicated by third-party build setups, but for now, sorry.
This commit is contained in:
Camilla Löwy
2021-06-21 22:14:40 +02:00
parent 58b48a3a00
commit 111c02d74e
6 changed files with 22 additions and 39 deletions
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src/posix_time.c
+8 -28
View File
@@ -27,13 +27,10 @@
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#define _POSIX_C_SOURCE 199309L
#include "internal.h"
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
//////////////////////////////////////////////////////////////////////////
@@ -44,20 +41,14 @@
//
void _glfwInitTimerPOSIX(void)
{
#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
struct timespec ts;
_glfw.timer.posix.clock = CLOCK_REALTIME;
_glfw.timer.posix.frequency = 1000000000;
#if defined(_POSIX_MONOTONIC_CLOCK)
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
{
_glfw.timer.posix.monotonic = GLFW_TRUE;
_glfw.timer.posix.frequency = 1000000000;
}
else
_glfw.timer.posix.clock = CLOCK_MONOTONIC;
#endif
{
_glfw.timer.posix.monotonic = GLFW_FALSE;
_glfw.timer.posix.frequency = 1000000;
}
}
@@ -67,20 +58,9 @@ void _glfwInitTimerPOSIX(void)
uint64_t _glfwPlatformGetTimerValue(void)
{
#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
if (_glfw.timer.posix.monotonic)
{
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec;
}
else
#endif
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (uint64_t) tv.tv_sec * (uint64_t) 1000000 + (uint64_t) tv.tv_usec;
}
struct timespec ts;
clock_gettime(_glfw.timer.posix.clock, &ts);
return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec;
}
uint64_t _glfwPlatformGetTimerFrequency(void)