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authornormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-06-30 00:51:57 (GMT)
committernormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-06-30 00:51:57 (GMT)
commitce2a3b40ed06a25e9292dd7d02b311510d0ba8e2 (patch)
tree5150e7c0b581692d5651539ef8a74fef74a8c8bf /thread_pthread.c
parent47f3c4d1477ebc479a5e0ab4342e1d86604caeb9 (diff)
use SIGCHLD_LOSSY to enable waitpid polling mode
Some systems lack SIGCHLD or have incomplete SIGCHLD implementations. So enable polling mode for them. [ruby-core:87705] [Bug #14867] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63795 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'thread_pthread.c')
-rw-r--r--thread_pthread.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/thread_pthread.c b/thread_pthread.c
index 6ac7728..401fc0c 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1375,6 +1375,16 @@ timer_thread_sleep(rb_global_vm_lock_t* gvl)
need_polling = !ubf_threads_empty();
+ if (SIGCHLD_LOSSY && !need_polling) {
+ rb_vm_t *vm = container_of(gvl, rb_vm_t, gvl);
+
+ rb_native_mutex_lock(&vm->waitpid_lock);
+ if (!list_empty(&vm->waiting_pids) || !list_empty(&vm->waiting_grps)) {
+ need_polling = 1;
+ }
+ rb_native_mutex_unlock(&vm->waitpid_lock);
+ }
+
if (gvl->waiting > 0 || need_polling) {
/* polling (TIME_QUANTUM_USEC usec) */
result = poll(pollfds, 1, TIME_QUANTUM_USEC/1000);