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authorRickard Green <[email protected]>2015-02-13 03:18:16 +0100
committerRickard Green <[email protected]>2015-03-20 15:28:52 +0100
commitfa7b2c00cbf9212c4a3551980939b92fc6606510 (patch)
treee3978ac46d61aff7b6f66e67fd763de57a4414bd /erts/lib_src/win
parent6487aac5977cf470bc6a2cd0964da2850ee38717 (diff)
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Implement ethread events with timeout
Diffstat (limited to 'erts/lib_src/win')
-rw-r--r--erts/lib_src/win/ethr_event.c53
1 files changed, 47 insertions, 6 deletions
diff --git a/erts/lib_src/win/ethr_event.c b/erts/lib_src/win/ethr_event.c
index bc2f635c26..a0d506356d 100644
--- a/erts/lib_src/win/ethr_event.c
+++ b/erts/lib_src/win/ethr_event.c
@@ -25,9 +25,16 @@
#define ETHR_EVENT_IMPL__
#include "ethread.h"
+#include "ethr_internal.h"
/* --- Windows implementation of thread events ------------------------------ */
+void
+ethr_init_event__(void)
+{
+
+}
+
int
ethr_event_init(ethr_event *e)
{
@@ -58,11 +65,29 @@ ethr_event_reset(ethr_event *e)
}
static ETHR_INLINE int
-wait(ethr_event *e, int spincount)
+wait(ethr_event *e, int spincount, ethr_sint64_t timeout)
{
- DWORD code;
+ DWORD code, tmo;
int sc, res, until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ if (timeout < 0)
+ tmo = INFINITE;
+ else if (timeout == 0) {
+ ethr_sint32_t state = ethr_atomic32_read(&e->state);
+ if (state == ETHR_EVENT_ON__) {
+ ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore);
+ return 0;
+ }
+ return ETIMEDOUT;
+ }
+ else {
+ /*
+ * Timeout in nano-seconds, but we can only
+ * wait for milli-seconds...
+ */
+ tmo = (DWORD) (timeout - 1) / (1000*1000) + 1;
+ }
+
if (spincount < 0)
ETHR_FATAL_ERROR__(EINVAL);
@@ -72,8 +97,10 @@ wait(ethr_event *e, int spincount)
ethr_sint32_t state;
while (1) {
state = ethr_atomic32_read(&e->state);
- if (state == ETHR_EVENT_ON__)
+ if (state == ETHR_EVENT_ON__) {
+ ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore);
return 0;
+ }
if (sc == 0)
break;
sc--;
@@ -95,7 +122,9 @@ wait(ethr_event *e, int spincount)
ETHR_ASSERT(state == ETHR_EVENT_OFF__);
}
- code = WaitForSingleObject(e->handle, INFINITE);
+ code = WaitForSingleObject(e->handle, tmo);
+ if (code == WAIT_TIMEOUT)
+ return ETIMEDOUT;
if (code != WAIT_OBJECT_0)
ETHR_FATAL_ERROR__(ethr_win_get_errno__());
}
@@ -105,11 +134,23 @@ wait(ethr_event *e, int spincount)
int
ethr_event_wait(ethr_event *e)
{
- return wait(e, 0);
+ return wait(e, 0, -1);
}
int
ethr_event_swait(ethr_event *e, int spincount)
{
- return wait(e, spincount);
+ return wait(e, spincount, -1);
+}
+
+int
+ethr_event_twait(ethr_event *e, ethr_sint64_t timeout)
+{
+ return wait(e, 0, timeout);
+}
+
+int
+ethr_event_stwait(ethr_event *e, int spincount, ethr_sint64_t timeout)
+{
+ return wait(e, spincount, timeout);
}