4 files changed, 19 insertions, 8 deletions
diff --git a/erts/emulator/sys/win32/erl_poll.c b/erts/emulator/sys/win32/erl_poll.c
index ab4ef05118..7a1d129cd5 100644
--- a/erts/emulator/sys/win32/erl_poll.c
+++ b/erts/emulator/sys/win32/erl_poll.c
@@ -442,8 +442,8 @@ poll_wait_timeout(ErtsPollSet ps, SysTimeval *tvp)
     if (erts_atomic32_read_nob(&ps->wakeup_state) != ERTS_POLL_NOT_WOKEN)
 	return (DWORD) 0;
 
-    if (timeout > ERTS_AINT32_T_MAX) /* Also prevents DWORD overflow */
-	timeout = ERTS_AINT32_T_MAX;
+    if (timeout > ((time_t) ERTS_AINT32_T_MAX))
+	timeout = ERTS_AINT32_T_MAX; /* Also prevents DWORD overflow */
 
     erts_smp_atomic32_set_relb(&ps->timeout, (erts_aint32_t) timeout);
     return (DWORD) timeout;
@@ -1012,7 +1012,7 @@ void  erts_poll_interrupt(ErtsPollSet ps, int set /* bool */)
 
 void erts_poll_interrupt_timed(ErtsPollSet ps,
 			       int set /* bool */,
-			       long msec)
+			       erts_short_time_t msec)
 {
     HARDTRACEF(("In erts_poll_interrupt_timed(%d,%ld)",set,msec));
     if (!set)
diff --git a/erts/emulator/sys/win32/erl_win_sys.h b/erts/emulator/sys/win32/erl_win_sys.h
index d770691026..cf3fb4446f 100644
--- a/erts/emulator/sys/win32/erl_win_sys.h
+++ b/erts/emulator/sys/win32/erl_win_sys.h
@@ -117,9 +117,20 @@ int erts_check_io_debug(void);
 #define SYS_CLK_TCK 1000
 #define SYS_CLOCK_RESOLUTION 1
 
+#if SIZEOF_TIME_T != 8
+#  error "Unexpected sizeof(time_t)"
+#endif
+
+/*
+ * gcc uses a 4 byte time_t and vc++ uses an 8 byte time_t.
+ * Types seen in beam_emu.c *need* to have the same size
+ * as in the rest of the system...
+ */
+typedef __int64 erts_time_t;
+
 typedef struct {
-    long tv_sec;
-    long tv_usec;
+    erts_time_t tv_sec;
+    erts_time_t tv_usec;
 } SysTimeval;
 
 typedef struct {
diff --git a/erts/emulator/sys/win32/sys.c b/erts/emulator/sys/win32/sys.c
index a49fa8ca34..a701747b78 100755
--- a/erts/emulator/sys/win32/sys.c
+++ b/erts/emulator/sys/win32/sys.c
@@ -3290,7 +3290,7 @@ erts_sys_schedule_interrupt(int set)
 
 #ifdef ERTS_SMP
 void
-erts_sys_schedule_interrupt_timed(int set, long msec)
+erts_sys_schedule_interrupt_timed(int set, erts_short_time_t msec)
 {
     erts_check_io_interrupt_timed(set, msec);
 }
diff --git a/erts/emulator/sys/win32/sys_time.c b/erts/emulator/sys/win32/sys_time.c
index fc868507cb..e5b9513edc 100644
--- a/erts/emulator/sys/win32/sys_time.c
+++ b/erts/emulator/sys/win32/sys_time.c
@@ -55,8 +55,8 @@ sys_gettimeofday(SysTimeval *tv)
     GetSystemTime(&t);
     SystemTimeToFileTime(&t, &ft);
     memcpy(&lft, &ft, sizeof(lft));
-    tv->tv_usec = (long) ((lft / LL_LITERAL(10)) % LL_LITERAL(1000000));
-    tv->tv_sec = (long) ((lft / LL_LITERAL(10000000)) - EPOCH_JULIAN_DIFF);
+    tv->tv_usec = (erts_time_t) ((lft / LL_LITERAL(10)) % LL_LITERAL(1000000));
+    tv->tv_sec = (erts_time_t) ((lft / LL_LITERAL(10000000)) - EPOCH_JULIAN_DIFF);
 }
 
 SysHrTime