From ef2e26c91b80556af033d3335e55f5dfa6fff31d Mon Sep 17 00:00:00 2001 From: Andrew Tridgell Date: Wed, 13 Aug 2003 01:53:07 +0000 Subject: first public release of samba4 code (This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f) --- source4/build/tests/shared_mmap.c | 68 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 source4/build/tests/shared_mmap.c (limited to 'source4/build/tests/shared_mmap.c') diff --git a/source4/build/tests/shared_mmap.c b/source4/build/tests/shared_mmap.c new file mode 100644 index 0000000000..fcef75d0d6 --- /dev/null +++ b/source4/build/tests/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 varient of FAST_SHARE_MODES */ + +#if defined(HAVE_UNISTD_H) +#include +#endif +#include +#include +#include +#include + +#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); +} -- cgit