From f9b529b75982902c9b31ee59fe73e2c56b8ba237 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Sun, 5 Nov 2017 16:14:32 +0100
Subject: thread: Add 'thread_alive' helper

---
 src/thread.c | 11 +++++++++++
 src/thread.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/src/thread.c b/src/thread.c
index fdc8112..b84ee66 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -53,6 +53,17 @@ void thread_join(thread_t thread)
 #endif
 }
 
+int thread_alive(thread_t thread)
+{
+	if (!thread)
+		return 0;
+#ifdef WIN32
+	return WaitForSingleObject(thread, 0) == WAIT_TIMEOUT;
+#else
+	return pthread_kill(thread, 0) == 0;
+#endif
+}
+
 void mutex_init(mutex_t* mutex)
 {
 #ifdef WIN32
diff --git a/src/thread.h b/src/thread.h
index bd53c5b..11e789a 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -46,6 +46,7 @@ typedef void* (*thread_func_t)(void* data);
 int thread_new(thread_t* thread, thread_func_t thread_func, void* data);
 void thread_free(thread_t thread);
 void thread_join(thread_t thread);
+int thread_alive(thread_t thread);
 
 void mutex_init(mutex_t* mutex);
 void mutex_destroy(mutex_t* mutex);
-- 
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