1 files changed, 77 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libpthread/pthread_atfork.c b/mdk-stage1/dietlibc/libpthread/pthread_atfork.c
new file mode 100644
index 000000000..2dc612dcc
--- /dev/null
+++ b/mdk-stage1/dietlibc/libpthread/pthread_atfork.c
@@ -0,0 +1,77 @@
+#include <unistd.h>
+#include <errno.h>
+
+#include <pthread.h>
+#include "thread_internal.h"
+
+#define PTHREAD_NUM_ATFORK 4
+
+static struct _pthread_fastlock __atfork_struct_lock;
+static struct {
+  int used;
+  void (*prepare)(void);
+  void (*parent)(void);
+  void (*child)(void);
+} pthread_atfork_buf[PTHREAD_NUM_ATFORK];
+
+int pthread_atfork(void (*prepare)(void),
+		   void (*parent)(void),
+		   void (*child)(void))
+{
+  int i,ret=-1;
+
+  __NO_ASYNC_CANCEL_BEGIN;
+  __pthread_lock(&__atfork_struct_lock);
+
+  for (i=0;i<PTHREAD_NUM_ATFORK; ++i) {
+    if (!(pthread_atfork_buf[i].used)) {
+      pthread_atfork_buf[i].prepare=prepare;
+      pthread_atfork_buf[i].parent=parent;
+      pthread_atfork_buf[i].child=child;
+      ret=0;
+      break;
+    }
+  }
+
+  __pthread_unlock(&__atfork_struct_lock);
+  __NO_ASYNC_CANCEL_END;
+
+  if (ret) (*(__errno_location()))=ENOMEM;
+  return ret;
+}
+
+pid_t fork(void)
+{
+  pid_t pid;
+  int i=PTHREAD_NUM_ATFORK;
+
+  __NO_ASYNC_CANCEL_BEGIN;
+
+  __TEST_CANCEL();
+  __pthread_lock(&__atfork_struct_lock);
+
+  while (i) {
+    if (pthread_atfork_buf[--i].used)
+      if (pthread_atfork_buf[i].prepare)
+	pthread_atfork_buf[i].prepare();
+  }
+
+  pid=__libc_fork();
+
+  if (pid>0) {		/* parent */
+    for (i=0;i<PTHREAD_NUM_ATFORK;++i)
+      if (pthread_atfork_buf[i].used)
+	if (pthread_atfork_buf[i].parent)
+	  pthread_atfork_buf[i].parent();
+  } else if (pid==0) {	/* child */
+    for (i=0;i<PTHREAD_NUM_ATFORK;++i)
+      if (pthread_atfork_buf[i].used)
+	if (pthread_atfork_buf[i].child)
+	  pthread_atfork_buf[i].child();
+  }
+
+  __pthread_unlock(&__atfork_struct_lock);
+  __NO_ASYNC_CANCEL_END;
+
+  return pid;
+}