osfmk/ipc/ipc_space.h

37  * documentation is hereby granted, provided that both the copyright
59  * is included in support of clause 2.2 (b) of the Apple Public License,
105  *	unaffected while the grow operation is underway.
110 #define IS_INACTIVE	0x40000000	/* space is inactive */
111 #define IS_GROWING	0x20000000	/* space is growing */
126 #define is_active(is) 		(((is)->is_bits & IS_INACTIVE) != IS_INACTIVE)
129 is_mark_inactive(ipc_space_t is)
131 	assert(is_active(is));
132 	OSBitOrAtomic(IS_INACTIVE, &is->is_bits);
135 #define is_growing(is)		(((is)->is_bits & IS_GROWING) == IS_GROWING)
138 is_start_growing(ipc_space_t is)
140 	assert(!is_growing(is));
141 	OSBitOrAtomic(IS_GROWING, &is->is_bits);
145 is_done_growing(ipc_space_t is)
147 	assert(is_growing(is));
148 	OSBitAndAtomic(~IS_GROWING, &is->is_bits);
154 #define	is_free(is)		zfree(ipc_space_zone, (is))
168 #define	is_lock_init(is)	lck_spin_init(&(is)->is_lock_data, &ipc_lck_grp, &ipc_lck_attr)
169 #define	is_lock_destroy(is)	lck_spin_destroy(&(is)->is_lock_data, &ipc_lck_grp)
171 #define	is_read_lock(is)	lck_spin_lock(&(is)->is_lock_data)
172 #define is_read_unlock(is)	lck_spin_unlock(&(is)->is_lock_data)
173 #define is_read_sleep(is)	lck_spin_sleep(&(is)->is_lock_data,	\
175 							(event_t)(is),						\
178 #define	is_write_lock(is)	lck_spin_lock(&(is)->is_lock_data)
179 #define	is_write_lock_try(is)	lck_spin_try_lock(&(is)->is_lock_data)
180 #define is_write_unlock(is)	lck_spin_unlock(&(is)->is_lock_data)
181 #define is_write_sleep(is)	lck_spin_sleep(&(is)->is_lock_data,	\
183 							(event_t)(is),						\
186 #define is_refs(is)		((is)->is_bits & IS_REFS_MAX)
189 is_reference(ipc_space_t is)
191 	assert(is_refs(is) > 0 && is_refs(is) < IS_REFS_MAX);
192 	OSIncrementAtomic(&(is->is_bits));
197 is_release(ipc_space_t is) {
198 	assert(is_refs(is) > 0);
201 	if ( 1 == (OSDecrementAtomic(&(is->is_bits)) & IS_REFS_MAX)) {
202 		is_lock_destroy(is);
203 		is_free(is);