When the async subsystem is used, we may spawn off
sub-threads (if the platform supports it), and consider the
original thread to be the "main" thread of execution. We use
this information in a custom die_routine to decide whether
to call pthread_exit or a regular full-process exit.
Let's pull this decision out into its own function so that
other parts of the system can use it to make decisions.
Signed-off-by: Jeff King <p...@peff.net>
---
run-command.c | 15 ++++++++++++++-
run-command.h | 10 ++++++++++
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/run-command.c b/run-command.c
index 765c2ce..69ca052 100644
--- a/run-command.c
+++ b/run-command.c
@@ -603,7 +603,7 @@ static NORETURN void die_async(const char *err, va_list
params)
{
vreportf("fatal: ", err, params);
- if (!pthread_equal(main_thread, pthread_self())) {
+ if (!running_main_thread()) {
struct async *async = pthread_getspecific(async_key);
if (async->proc_in >= 0)
close(async->proc_in);
@@ -614,6 +614,19 @@ static NORETURN void die_async(const char *err, va_list
params)
exit(128);
}
+
+int running_main_thread(void)
+{
+ return pthread_equal(main_thread, pthread_self());
+}
+
+#else /* NO_PTHREADS defined */
+
+int running_main_thread(void)
+{
+ return 1;
+}
+
#endif
int start_async(struct async *async)
diff --git a/run-command.h b/run-command.h
index 221ce33..981dd10 100644
--- a/run-command.h
+++ b/run-command.h
@@ -92,4 +92,14 @@ int finish_async(struct async *async);
int start_async(struct async *async);
int finish_async(struct async *async);
+/*
+ * If the platform supports threads, returns 1 if we are running the "main"
+ * thread that spawned other async threads, and zero if we are executing one
+ * of the async threads.
+ *
+ * If the platform does not support threads, returns 1 (we are always in the
+ * main thread then).
+ */
+int running_main_thread(void);
+
#endif
--
1.8.2.8.g44e4c28
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