use SwitchToThread() instead of Sleep(0), because the later

may not yield control, if there is no thread with higher priority

diff --git a/src/os/win32/ngx_process.h b/src/os/win32/ngx_process.h
index 55f5648ee7a21f84ecf1694a1ff6729e4547b6b8..235b2502f22fb79ac8a192c38fac18b1e7a39149 100644 (file)
--- a/src/os/win32/ngx_process.h
+++ b/src/os/win32/ngx_process.h
@@ -52,7 +52,7 @@ ngx_pid_t ngx_spawn_process(ngx_cycle_t *cycle, char *name, ngx_int_t respawn);
 ngx_pid_t ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx);
 
 #define ngx_debug_point()
-#define ngx_sched_yield()   Sleep(0)
+#define ngx_sched_yield()   SwitchToThread()
 
 
 #define NGX_MAX_PROCESSES         (MAXIMUM_WAIT_OBJECTS - 4)