diff options
Diffstat (limited to 'sys/cam/ctl/ctl_mem_pool.h')
| -rw-r--r-- | sys/cam/ctl/ctl_mem_pool.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sys/cam/ctl/ctl_mem_pool.h b/sys/cam/ctl/ctl_mem_pool.h new file mode 100644 index 0000000..a1df7e3 --- /dev/null +++ b/sys/cam/ctl/ctl_mem_pool.h @@ -0,0 +1,83 @@ +/*- + * Copyright (c) 2003, 2004 Silicon Graphics International Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + * + * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_mem_pool.h#1 $ + * $FreeBSD$ + */ +/* + * CAM Target Layer memory pool code. + * + * Author: Ken Merry <ken@FreeBSD.org> + */ + +#ifndef _CTL_MEMPOOL_H_ +#define _CTL_MEMPOOL_H_ + +typedef enum { + CTL_MEM_POOL_NONE, + CTL_MEM_POOL_PERM_GROW +} ctl_mem_pool_flags; + +struct ctl_mem_pool { + ctl_mem_pool_flags flags; + int chunk_size; + int grow_inc; + struct mtx lock; + struct cv wait_mem; + STAILQ_HEAD(, ctl_mem_element) free_mem_list; +}; + +typedef enum { + CTL_MEM_ELEMENT_NONE, + CTL_MEM_ELEMENT_PREALLOC +} ctl_mem_element_flags; + +struct ctl_mem_element { + ctl_mem_element_flags flags; + struct ctl_mem_pool *pool; + uint8_t *bytes; + STAILQ_ENTRY(ctl_mem_element) links; +}; + +#ifdef _KERNEL + +MALLOC_DECLARE(M_CTL_POOL); + +int ctl_init_mem_pool(struct ctl_mem_pool *pool, int chunk_size, + ctl_mem_pool_flags flags, int grow_inc, + int initial_pool_size); +struct ctl_mem_element *ctl_alloc_mem_element(struct ctl_mem_pool *pool, + int can_wait); +void ctl_free_mem_element(struct ctl_mem_element *mem); +int ctl_grow_mem_pool(struct ctl_mem_pool *pool, int count, + int can_wait); +int ctl_shrink_mem_pool(struct ctl_mem_pool *pool); +#endif /* _KERNEL */ + +#endif /* _CTL_MEMPOOL_H_ */ |
