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Detect monotonic condvar support at configure time

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This commit is contained in:
Antonio Andelic
2026-07-14 07:38:49 +02:00
committed by Guangli Dai
parent ebacec3a1a
commit 8361239b03
3 changed files with 87 additions and 46 deletions
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37
configure.ac
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@@ -2224,6 +2224,43 @@ dnl Check if we have dlsym support.
if test "x${je_cv_pthread_get_name_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_GET_NAME_NP], [ ], [ ])
fi
dnl Runtime-check pthread_condattr_setclock and clock_gettime with
dnl CLOCK_MONOTONIC to confirm the kernel actually supports the
dnl monotonic clock.
AC_CACHE_CHECK([whether pthread_condattr_setclock with CLOCK_MONOTONIC is usable],
[je_cv_pthread_cond_timedwait_monotonic],
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[[
#include <pthread.h>
#include <time.h>
]], [[
pthread_condattr_t attr;
pthread_cond_t cond;
struct timespec ts;
int ret = pthread_condattr_init(&attr);
if (ret != 0) {
return 1;
}
ret = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
if (ret != 0) {
pthread_condattr_destroy(&attr);
return 1;
}
ret = pthread_cond_init(&cond, &attr);
pthread_condattr_destroy(&attr);
if (ret != 0) {
return 1;
}
ret = clock_gettime(CLOCK_MONOTONIC, &ts);
pthread_cond_destroy(&cond);
return ret != 0;
]])],
[je_cv_pthread_cond_timedwait_monotonic=yes],
[je_cv_pthread_cond_timedwait_monotonic=no],
[je_cv_pthread_cond_timedwait_monotonic=no]))
if test "x${je_cv_pthread_cond_timedwait_monotonic}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC], [ ], [ ])
fi
fi
JE_APPEND_VS(CPPFLAGS, -D_REENTRANT)