bsd/kern/sysv_sem.c

7  * as defined in and that are subject to the Apple Public Source License
8  * Version 2.0 (the 'License'). You may not use this file except in
39  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
41  * is included in support of clause 2.2 (b) of the Apple Public License,
88 	SEMMAP,        /* # of entries in semaphore map */
90 	SEMMNS,        /* # of semaphores in system */
91 	SEMMNU,        /* # of undo structures in system */
95 	SEMUSZ,        /* size in bytes of undo structure */
105 	SEMMAP,	/* Unused, # of entries in semaphore map */
107 	0,	/* # of semaphores in system */
108 	0,	/* # of undo entries in system */
112 	SEMUSZ,	/* size in bytes of undo structure */
176 semid_ds_kernelto32(struct user_semid_ds *in, struct user32_semid_ds *out)
178 	out->sem_perm = in->sem_perm;
179 	out->sem_base = CAST_DOWN_EXPLICIT(__int32_t,in->sem_base);
180 	out->sem_nsems = in->sem_nsems;
181 	out->sem_otime = in->sem_otime;		/* XXX loses precision */
182 	out->sem_ctime = in->sem_ctime;		/* XXX loses precision */
186 semid_ds_kernelto64(struct user_semid_ds *in, struct user64_semid_ds *out)
188 	out->sem_perm = in->sem_perm;
189 	out->sem_base = CAST_DOWN_EXPLICIT(__int32_t,in->sem_base);
190 	out->sem_nsems = in->sem_nsems;
191 	out->sem_otime = in->sem_otime;		/* XXX loses precision */
192 	out->sem_ctime = in->sem_ctime;		/* XXX loses precision */
199  * this works because we copy fields in order from the end of the struct to
206 semid_ds_32tokernel(struct user32_semid_ds *in, struct user_semid_ds *out)
208 	out->sem_ctime = in->sem_ctime;
209 	out->sem_otime = in->sem_otime;
210 	out->sem_nsems = in->sem_nsems;
211 	out->sem_base = (void *)(uintptr_t)in->sem_base;
212 	out->sem_perm = in->sem_perm;
216 semid_ds_64tokernel(struct user64_semid_ds *in, struct user_semid_ds *out)
218 	out->sem_ctime = in->sem_ctime;
219 	out->sem_otime = in->sem_otime;
220 	out->sem_nsems = in->sem_nsems;
221 	out->sem_base = (void *)(uintptr_t)in->sem_base;
222 	out->sem_perm = in->sem_perm;
235  * Indirect parameters:	uap->which	sem call to invoke (index in array of sem calls)
305 	 * so they're already marked as "not in use".
385 	 * flag to MALLOC() above, so they're already marked as "not in use".
446 		if (sema[i].u.sem_perm.mode & SEM_ALLOC)  /* ID in use */
488 		 * Fill it in and return it if we find one.
509 			/* All the structures are in use - try to free some */
623 	/* fill in the new semaphore undo entry */
674  * because the alignment is the same in user and kernel space.
821 			/* XXX could be done in one go... */
873 			/* XXX could be done in one go... */
1313 			 * rollback the undo's in the exact reverse order that
1461 		 * in the BSD code at once.
1489          * There is a semaphore leak (i.e. memory leak) in this code.
1497          * with the creating group ID, count the number of processes left in
1584 	/* Copy in the command structure */
1589 	if (!IS_64BIT_PROCESS(p)) /* convert in place */
1650 			if (!IS_64BIT_PROCESS(p))       /* convert in place */