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* cygwin.din (shm_open): Export.

Browse Source 
(shm_unlink): Export.
	* syscalls.cc (shm_open): New function.
	(shm_unlink): New function.
	* sysconf.cc (sca): Set value of _SC_SHARED_MEMORY_OBJECTS to
	_POSIX_SHARED_MEMORY_OBJECTS.
	* include/cygwin/version.h: Bump API minor number.
	* include/sys/mman.h (shm_open): Add prototype.
	(shm_unlink): Ditto.
This commit is contained in:
Corinna Vinschen
2007-02-08 13:36:53 +00:00
parent d7e4c7a807
commit ce8bab5a92
6 changed files with 66 additions and 2 deletions
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46
winsup/cygwin/syscalls.cc
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@@ -3346,3 +3346,49 @@ pclose (FILE *fp)
return status;
}
#define SHM_STORAGE "/dev/shm"
extern "C" int
shm_open (const char *name, int oflag, mode_t mode)
{
/* Name must start with a single slash. */
if (!name || name[0] != '/' || name[1] == '/'
|| strlen (name) > CYG_MAX_PATH - sizeof (SHM_STORAGE))
{
debug_printf ("Invalid shared memory object name '%s'", name);
set_errno (EINVAL);
return -1;
}
/* Check for valid flags. */
if (((oflag & O_ACCMODE) != O_RDONLY && (oflag & O_ACCMODE) != O_RDWR)
|| (oflag & ~(O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC)))
{
debug_printf ("Invalid oflag 0%o", oflag);
set_errno (EINVAL);
return -1;
}
/* Note that we require the existance of /dev/shm here. We don't
create this directory from here. That's the task of the installer. */
char shmname[CYG_MAX_PATH];
strcpy (shmname, SHM_STORAGE);
strcat (shmname, name);
return open (shmname, oflag, mode & 0777);
}
extern "C" int
shm_unlink (const char *name)
{
/* Name must start with a single slash. */
if (!name || name[0] != '/' || name[1] == '/'
|| strlen (name) > CYG_MAX_PATH - sizeof (SHM_STORAGE))
{
debug_printf ("Invalid shared memory object name '%s'", name);
set_errno (EINVAL);
return -1;
}
char shmname[CYG_MAX_PATH];
strcpy (shmname, SHM_STORAGE);
strcat (shmname, name);
return unlink (shmname);
}