FreeBSD/Linux Kernel Cross Reference
sys/sys/objcache.h

     /*
      * Copyright (c) 2005 Jeffrey M. Hsu.  All rights reserved.
      *
      * This code is derived from software contributed to The DragonFly Project
      * by Jeffrey M. Hsu.
      *
      * 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.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of The DragonFly Project nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific, prior written permission.
     *
     * 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 MERCHANTABILITY AND FITNESS
     * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
     * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, 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 DAMAGE.
     */
    
    #ifndef _SYS_OBJCACHE_H_
    #define _SYS_OBJCACHE_H_
    
    #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    #ifndef _SYS_MALLOC_H_
    #include <sys/malloc.h>
    #endif
    
    #define OC_MFLAGS       0x0000ffff      /* same as malloc flags */
    
    typedef __boolean_t (objcache_ctor_fn)(void *obj, void *privdata, int ocflags);
    typedef void (objcache_dtor_fn)(void *obj, void *privdata);
    
    /*
     * Underlying allocator.
     */
    typedef void *(objcache_alloc_fn)(void *allocator_args, int ocflags);
    typedef void (objcache_free_fn)(void *obj, void *allocator_args);
    
    #ifdef  _KERNEL
    
    struct objcache;
    
    struct objcache
            *objcache_create(const char *name, int cluster_limit, int nom_cache,
                             objcache_ctor_fn *ctor, objcache_dtor_fn *dtor,
                             void *privdata,
                             objcache_alloc_fn *alloc, objcache_free_fn *free,
                             void *allocator_args);
    struct objcache
            *objcache_create_simple(malloc_type_t mtype, size_t objsize);
    struct objcache
            *objcache_create_mbacked(malloc_type_t mtype, size_t objsize,
                              int cluster_limit, int nom_cache,
                              objcache_ctor_fn *ctor, objcache_dtor_fn *dtor,
                              void *privdata);
    void    *objcache_get(struct objcache *oc, int ocflags);
    void     objcache_put(struct objcache *oc, void *obj);
    void     objcache_dtor(struct objcache *oc, void *obj);
    void     objcache_populate_linear(struct objcache *oc, void *elts, int nelts,
                                      int size);
    __boolean_t objcache_reclaimlist(struct objcache *oc[], int nlist, int ocflags);
    void     objcache_destroy(struct objcache *oc);
    
    #endif
    
    /*
     * Common underlying allocators.
     */
    struct objcache_malloc_args {
            size_t          objsize;
            malloc_type_t   mtype;
    };
    
    #ifdef  _KERNEL
    
    void    *objcache_malloc_alloc(void *allocator_args, int ocflags);
    void     objcache_malloc_free(void *obj, void *allocator_args);
    
    void    *objcache_nop_alloc(void *allocator_args, int ocflags);
    void     objcache_nop_free(void *obj, void *allocator_args);
    
    #endif  /* _KERNEL */
   
   #endif  /* _KERNEL || _KERNEL_STRUCTURES */
   #endif  /* !_SYS_OBJCACHE_H_ */

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