Differences between current version and revision by previous author of mmap(2).
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| Newer page: | version 6 | Last edited on Thursday, September 9, 2004 4:54:28 pm | by JohnMcPherson | |
| Older page: | version 5 | Last edited on Monday, March 10, 2003 8:24:12 pm | by PerryLorier | Revert |
@@ -6,9 +6,11 @@
#include <sys/mman.h>
#ifdef _POSIX_MAPPED_FILES
- __void *mmap(void *__''start''__,
size_t __''length''__, int
__''prot''__ ,
int __''flags''__,
int __''fd''__,
off_t __''offset''__);__
+ __void *mmap(void *__''start'',
__size_t__ ''length'',
__in
__ ''prot'',
__int__
''flags'',
__int__ ''fd'',
__off_t__ ''offset''__);__
+
+ __void munmap(void *__''start''__, size_t__ ''length
''__);__
#endif
!!DESCRIPTION
@@ -53,10 +55,17 @@
Use of a mapped region can result in these signals:
;[SIGSEGV]: Attempted write into a region specified to mmap as read-only.
;[SIGBUS]: Attempted access to a portion of the buffer that does not correspond to the file (for example, beyond the end of the file, including the case where another process has truncated the file).
+
+!!AVAILABILITY
+On [POSIX] systems on which mmap, msync and munmap are available,
+_POSIX_MAPPED_FILES is defined in <unistd.h> to a value greater than 0.
+(See also sysconf(3).)
+
!!CONFORMING TO
-SVr4, POSIX.1b (formerly POSIX.4), 4.4BSD. Svr4 documents additional error codes [ENXIO] and [ENODEV].
+SVr4, [
POSIX]
.1b (formerly POSIX.4), 4.4BSD, SUSv2
. Svr4 documents additional error codes [ENXIO] and [ENODEV]. SUSv2 documents additional error codes
+[EMFILE] and [EOVERFLOW
].
!!SEE ALSO
getpagesize(2), msync(2), shm_open(2), B.O. Gallmeister, POSIX.4, O'Reilly, pp. 128-129 and 389-391.
