From a995e477ffb4dd1184da87e9e46a9e57f3178c63 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Wed, 1 Oct 2003 02:50:57 +0000
Subject: Various tweaks to make things run on Mac OS. The main change is the
 use of pthread to implement ffork.

---
 src/cmd/sam/unix.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'src/cmd')

diff --git a/src/cmd/sam/unix.c b/src/cmd/sam/unix.c
index cc15db44..205af4cd 100644
--- a/src/cmd/sam/unix.c
+++ b/src/cmd/sam/unix.c
@@ -270,3 +270,39 @@ int create(char *name, int omode, int perm)
 
     return fd;                          
 }
+
+/* SHOULD BE ELSEWHERE */
+#ifdef __APPLE__
+#include <lib9.h>
+
+Lock plk;
+
+ulong
+pread(int fd, void *buf, ulong n, ulong off)
+{
+	ulong rv;
+
+	lock(&plk);
+	if (lseek(fd, off, 0) != off)
+		return -1;
+	rv = read(fd, buf, n);
+	unlock(&plk);
+
+	return rv;
+}
+
+ulong
+pwrite(int fd, void *buf, ulong n, ulong off)
+{
+	ulong rv;
+
+	lock(&plk);
+	if (lseek(fd, off, 0) != off)
+		return -1;
+	rv = write(fd, buf, n);
+	unlock(&plk);
+
+	return rv;
+}
+#endif
+
-- 
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