freem/src/shmmgr.h - diff

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version 1.4, 2025/03/26 15:17:12	version 1.5, 2025/05/08 16:29:18
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* along with FreeM. If not, see <https://www.gnu.org/licenses/>.	* along with FreeM. If not, see <https://www.gnu.org/licenses/>.
*	*
* $Log$	* $Log$
	* Revision 1.5 2025/05/08 16:29:18 snw
	* Add SOM/SOA/SBM/SBA macros from RSM and modify for FreeM
	*
* Revision 1.4 2025/03/26 15:17:12 snw	* Revision 1.4 2025/03/26 15:17:12 snw
* Fall back to global-backed SSVNs when memory-backed globals fail in attempt to fix Tru64	* Fall back to global-backed SSVNs when memory-backed globals fail in attempt to fix Tru64
*	*
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#define SHMALIGN(a) (void *) (((unsigned long) a + sysconf (_SC_PAGESIZE)) & ~(sysconf (_SC_PAGESIZE) - 1))	#define SHMALIGN(a) (void *) (((unsigned long) a + sysconf (_SC_PAGESIZE)) & ~(sysconf (_SC_PAGESIZE) - 1))

	/* The following macros were borrowed from Reference Standard M
	* SOM/SOA: reading and writing data stored in shared memory
	* SBM/SBA: for modifying pointers in shared memory
	*/
	#define SOM(ptr) ((__typeof__(ptr)) ((char ) (ptr) + ((char ) shm_config->dta - (char *) shm_config->hdr->shmad)))
	#define SOA(ptr) ((ptr == NULL) ? NULL : SOM(ptr))
	#define SBM(ptr) ((__typeof__(ptr)) ((char ) (ptr) - ((char ) shm_config->dta - (char *) shm_config->hdr->shmad)))
	#define SBA(ptr) ((ptr == NULL) ? NULL : SBM(ptr))

/* data structures */	/* data structures */

/* alloc map entry */	/* alloc map entry */