Add pthread_atfork(3) feature test.
Some versions of Android provide a pthreads library without providing
pthread_atfork(), so in practice a separate feature test is necessary
for the latter.
diff --git a/configure.ac b/configure.ac
index 15897be..25dcc2c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1299,6 +1299,14 @@
AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
[AC_SEARCH_LIBS([pthread_create], , ,
AC_MSG_ERROR([libpthread is missing]))])
+ JE_COMPILABLE([pthread_atfork(3)], [
+#include <pthread.h>
+], [
+ pthread_atfork((void *)0, (void *)0, (void *)0);
+], [je_cv_pthread_atfork])
+ if test "x${je_cv_pthread_atfork}" = "xyes" ; then
+ AC_DEFINE([JEMALLOC_HAVE_PTHREAD_ATFORK], [ ])
+ fi
fi
CPPFLAGS="$CPPFLAGS -D_REENTRANT"
diff --git a/include/jemalloc/internal/jemalloc_internal_defs.h.in b/include/jemalloc/internal/jemalloc_internal_defs.h.in
index baf12d4..c345214 100644
--- a/include/jemalloc/internal/jemalloc_internal_defs.h.in
+++ b/include/jemalloc/internal/jemalloc_internal_defs.h.in
@@ -79,6 +79,9 @@
*/
#undef JEMALLOC_HAVE_ISSETUGID
+/* Defined if pthread_atfork(3) is available. */
+#undef JEMALLOC_HAVE_PTHREAD_ATFORK
+
/*
* Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available.
*/
diff --git a/src/jemalloc.c b/src/jemalloc.c
index 2c405b7..7df3fc9 100644
--- a/src/jemalloc.c
+++ b/src/jemalloc.c
@@ -1264,8 +1264,9 @@
ncpus = malloc_ncpus();
-#if (!defined(JEMALLOC_MUTEX_INIT_CB) && !defined(JEMALLOC_ZONE) \
- && !defined(_WIN32) && !defined(__native_client__))
+#if (defined(JEMALLOC_HAVE_PTHREAD_ATFORK) && !defined(JEMALLOC_MUTEX_INIT_CB) \
+ && !defined(JEMALLOC_ZONE) && !defined(_WIN32) && \
+ !defined(__native_client__))
/* LinuxThreads' pthread_atfork() allocates. */
if (pthread_atfork(jemalloc_prefork, jemalloc_postfork_parent,
jemalloc_postfork_child) != 0) {
