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authorRickard Green <[email protected]>2016-09-02 10:43:39 +0200
committerRickard Green <[email protected]>2016-09-02 10:52:19 +0200
commitbc9d81f0e4b62927cf97e3e5b31fdb88ab3bceb9 (patch)
tree6608813543b2d9172ab381135d444ecc4bdf72fa /erts/emulator/test
parent82e5d81d57676a9e039d93544583895e92840beb (diff)
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Ensure long enough sleep in driver_SUITE:timer_delay driver
Diffstat (limited to 'erts/emulator/test')
-rw-r--r--erts/emulator/test/driver_SUITE.erl6
-rw-r--r--erts/emulator/test/driver_SUITE_data/timer_drv.c44
2 files changed, 42 insertions, 8 deletions
diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl
index 1df72193a6..2fbf6eae61 100644
--- a/erts/emulator/test/driver_SUITE.erl
+++ b/erts/emulator/test/driver_SUITE.erl
@@ -452,11 +452,7 @@ timer_delay(Config) when is_list(Config) ->
TimeBefore = erlang:monotonic_time(),
Timeout0 = 350,
erlang:port_command(Port, <<?DELAY_START_TIMER,Timeout0:32>>),
- Timeout = Timeout0 +
- case os:type() of
- {win32,_} -> 0; %Driver doesn't sleep on Windows.
- _ -> 1000
- end,
+ Timeout = Timeout0 + 1000,
receive
{Port,{data,[?TIMER]}} ->
Elapsed = erl_millisecs() - erl_millisecs(TimeBefore),
diff --git a/erts/emulator/test/driver_SUITE_data/timer_drv.c b/erts/emulator/test/driver_SUITE_data/timer_drv.c
index 57538e0d57..c3ce3b6e49 100644
--- a/erts/emulator/test/driver_SUITE_data/timer_drv.c
+++ b/erts/emulator/test/driver_SUITE_data/timer_drv.c
@@ -1,5 +1,13 @@
#include <stdio.h>
#include "erl_driver.h"
+#ifdef __WIN32__
+# include <windows.h>
+#else
+# include <sys/time.h>
+# include <sys/types.h>
+# include <sys/select.h>
+# include <unistd.h>
+#endif
#define get_int32(s) ((((unsigned char*) (s))[0] << 24) | \
(((unsigned char*) (s))[1] << 16) | \
@@ -17,6 +25,7 @@ static ErlDrvData timer_start(ErlDrvPort, char*);
static void timer_stop(ErlDrvData);
static void timer_read(ErlDrvData, char*, ErlDrvSizeT);
static void timer(ErlDrvData);
+static void ms_sleep(int ms);
static ErlDrvEntry timer_driver_entry =
{
@@ -75,9 +84,7 @@ static void timer_read(ErlDrvData p, char *buf, ErlDrvSizeT len)
reply[0] = CANCELLED;
driver_output(port, reply, 1);
} else if (buf[0] == DELAY_START_TIMER) {
-#ifndef __WIN32__
- sleep(1);
-#endif
+ ms_sleep(1000);
driver_set_timer(port, get_int32(buf + 1));
}
}
@@ -95,3 +102,34 @@ static void timer(ErlDrvData port)
reply[0] = TIMER;
driver_output((ErlDrvPort)port, reply, 1);
}
+
+static void
+ms_sleep(int ms)
+{
+ /* Important that we do not return too early... */
+ ErlDrvTime time, timeout_time;
+
+ time = erl_drv_monotonic_time(ERL_DRV_USEC);
+
+ timeout_time = time + ((ErlDrvTime) ms)*1000;
+
+ while (time < timeout_time) {
+ ErlDrvTime timeout = timeout_time - time;
+
+#ifdef __WIN32__
+ Sleep((DWORD) (timeout / 1000));
+#else
+ {
+ struct timeval tv;
+
+ tv.tv_sec = (long) timeout / (1000*1000);
+ tv.tv_usec = (long) timeout % (1000*1000);
+
+ select(0, NULL, NULL, NULL, &tv);
+ }
+#endif
+
+ time = erl_drv_monotonic_time(ERL_DRV_USEC);
+ }
+
+}