diff options
author | Jelmer Vernooij <jelmer@samba.org> | 2008-09-17 14:11:12 +0200 |
---|---|---|
committer | Jelmer Vernooij <jelmer@samba.org> | 2008-09-17 14:11:12 +0200 |
commit | 94855cd69248f0f90b6c828588afa012adc8bd45 (patch) | |
tree | 6a164679824d29f5e825d78720cc905c8982d8be /lib/replace/test/shared_mmap.c | |
parent | 323346f7b01314bdec418d585fae236f736068fa (diff) | |
download | samba-94855cd69248f0f90b6c828588afa012adc8bd45.tar.gz samba-94855cd69248f0f90b6c828588afa012adc8bd45.tar.bz2 samba-94855cd69248f0f90b6c828588afa012adc8bd45.zip |
Move common libraries from root to lib/.
Diffstat (limited to 'lib/replace/test/shared_mmap.c')
-rw-r--r-- | lib/replace/test/shared_mmap.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/replace/test/shared_mmap.c b/lib/replace/test/shared_mmap.c new file mode 100644 index 0000000000..50dad8d696 --- /dev/null +++ b/lib/replace/test/shared_mmap.c @@ -0,0 +1,68 @@ +/* this tests whether we can use a shared writeable mmap on a file - + as needed for the mmap variant of FAST_SHARE_MODES */ + +#if defined(HAVE_UNISTD_H) +#include <unistd.h> +#endif +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define DATA "conftest.mmap" + +#ifndef MAP_FILE +#define MAP_FILE 0 +#endif + +main() +{ + int *buf; + int i; + int fd = open(DATA,O_RDWR|O_CREAT|O_TRUNC,0666); + int count=7; + + if (fd == -1) exit(1); + + for (i=0;i<10000;i++) { + write(fd,&i,sizeof(i)); + } + + close(fd); + + if (fork() == 0) { + fd = open(DATA,O_RDWR); + if (fd == -1) exit(1); + + buf = (int *)mmap(NULL, 10000*sizeof(int), + (PROT_READ | PROT_WRITE), + MAP_FILE | MAP_SHARED, + fd, 0); + + while (count-- && buf[9124] != 55732) sleep(1); + + if (count <= 0) exit(1); + + buf[1763] = 7268; + exit(0); + } + + fd = open(DATA,O_RDWR); + if (fd == -1) exit(1); + + buf = (int *)mmap(NULL, 10000*sizeof(int), + (PROT_READ | PROT_WRITE), + MAP_FILE | MAP_SHARED, + fd, 0); + + if (buf == (int *)-1) exit(1); + + buf[9124] = 55732; + + while (count-- && buf[1763] != 7268) sleep(1); + + unlink(DATA); + + if (count > 0) exit(0); + exit(1); +} |