process-shared barrier support, based on discussion with bdonlan

[musl] / src / mman / munmap.c

diff --git a/src/mman/munmap.c b/src/mman/munmap.c
index ab7da9e..91aefd4 100644 (file)
--- a/src/mman/munmap.c
+++ b/src/mman/munmap.c
@@ -3,9 +3,18 @@
 #include "syscall.h"
 #include "libc.h"
 
 #include "syscall.h"
 #include "libc.h"
 

+static void dummy1(int x) { }
+static void dummy0(void) { }
+weak_alias(dummy1, __vm_lock);
+weak_alias(dummy0, __vm_unlock);
+

 int __munmap(void *start, size_t len)
 {
 int __munmap(void *start, size_t len)
 {

-       return syscall(SYS_munmap, start, len);
+       int ret;
+       __vm_lock(-1);
+       ret = syscall(SYS_munmap, start, len);
+       __vm_unlock();
+       return ret;

 }
 
 weak_alias(__munmap, munmap);
 }
 
 weak_alias(__munmap, munmap);