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author | Andrew Tridgell <tridge@samba.org> | 1998-07-29 03:08:05 +0000 |
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committer | Andrew Tridgell <tridge@samba.org> | 1998-07-29 03:08:05 +0000 |
commit | 64578c0589a3a741f81fb55c16eeb882128da00b (patch) | |
tree | 8b650156e44e4d39af8625185d857a88789b8074 /source3/tests/shared_mmap.c | |
parent | c48b3fce6be6d5d952cbcda0ddae223dda5a576f (diff) | |
download | samba-64578c0589a3a741f81fb55c16eeb882128da00b.tar.gz samba-64578c0589a3a741f81fb55c16eeb882128da00b.tar.bz2 samba-64578c0589a3a741f81fb55c16eeb882128da00b.zip |
merge from the autoconf2 branch to the main branch
(This used to be commit 3bda7ac417107a7b01d91805ca71c4330657ed21)
Diffstat (limited to 'source3/tests/shared_mmap.c')
-rw-r--r-- | source3/tests/shared_mmap.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/source3/tests/shared_mmap.c b/source3/tests/shared_mmap.c new file mode 100644 index 0000000000..fb8a2a32d5 --- /dev/null +++ b/source3/tests/shared_mmap.c @@ -0,0 +1,66 @@ +/* this tests whether we can use a shared writeable mmap on a file - + as needed for the mmap varient of FAST_SHARE_MODES */ + +#include <unistd.h> +#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, pid; + 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); +} |