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-rw-r--r--erts/emulator/sys/unix/sys.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index bc940d2084..5f38d73359 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -53,6 +53,11 @@
#define WANT_NONBLOCKING /* must define this to pull in defs from sys.h */
#include "sys.h"
+#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
+#define __DARWIN__ 1
+#endif
+
+
#ifdef USE_THREADS
#include "erl_threads.h"
#endif
@@ -2989,11 +2994,25 @@ init_smp_sig_notify(void)
NULL,
&thr_opts);
}
+#ifdef __DARWIN__
+
+int erts_darwin_main_thread_pipe[2];
+
+static void initialize_darwin_main_thread_pipe(void)
+{
+ if (pipe(erts_darwin_main_thread_pipe) < 0) {
+ erl_exit(1,"Fatal error initializing Darwin main thread stealing");
+ }
+}
+#endif
void
erts_sys_main_thread(void)
{
erts_thread_disable_fpe();
+#ifdef __DARWIN__
+ initialize_darwin_main_thread_pipe();
+#endif
/* Become signal receiver thread... */
#ifdef ERTS_ENABLE_LOCK_CHECK
erts_lc_set_thread_name("signal_receiver");
@@ -3002,6 +3021,27 @@ erts_sys_main_thread(void)
smp_sig_notify(0); /* Notify initialized */
while (1) {
/* Wait for a signal to arrive... */
+#ifdef __DARWIN__
+ /*
+ * The wx driver needs to be able to steal the main thread for Cocoa to
+ * work properly.
+ */
+ fd_set readfds;
+ int res;
+
+ FD_ZERO(&readfds);
+ FD_SET(erts_darwin_main_thread_pipe[0], &readfds);
+ res = select(erts_darwin_main_thread_pipe[0] + 1, &readfds, NULL, NULL, NULL);
+ if (res > 0 && FD_ISSET(erts_darwin_main_thread_pipe[0],&readfds)) {
+ void* (*func)(void*);
+ void* arg;
+ void *resp;
+ read(erts_darwin_main_thread_pipe[0],&func,sizeof(void* (*)(void*)));
+ read(erts_darwin_main_thread_pipe[0],&arg, sizeof(void*));
+ resp = (*func)(arg);
+ write(erts_darwin_main_thread_pipe[1],&resp,sizeof(void *));
+ }
+#else
#ifdef DEBUG
int res =
#else
@@ -3010,6 +3050,7 @@ erts_sys_main_thread(void)
select(0, NULL, NULL, NULL, NULL);
ASSERT(res < 0);
ASSERT(errno == EINTR);
+#endif
}
}