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Diffstat (limited to 'contrib/sendmail/include/sm/rpool.h')
| -rw-r--r-- | contrib/sendmail/include/sm/rpool.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/contrib/sendmail/include/sm/rpool.h b/contrib/sendmail/include/sm/rpool.h new file mode 100644 index 0000000..e750fcb --- /dev/null +++ b/contrib/sendmail/include/sm/rpool.h @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + * + * $Id: rpool.h,v 1.15 2001/09/04 22:41:55 ca Exp $ + */ + +/* +** libsm resource pools +** See libsm/rpool.html for documentation. +*/ + +#ifndef SM_RPOOL_H +# define SM_RPOOL_H + +# include <sm/gen.h> +# include <sm/heap.h> +# include <sm/string.h> + +/* +** Each memory pool object consists of an SM_POOLLINK_T, +** followed by a platform specific amount of padding, +** followed by 'poolsize' bytes of pool data, +** where 'poolsize' is the value of rpool->sm_poolsize at the time +** the pool is allocated. +*/ + +typedef struct sm_poollink SM_POOLLINK_T; +struct sm_poollink +{ + SM_POOLLINK_T *sm_pnext; +}; + +typedef void (*SM_RPOOL_RFREE_T) __P((void *_rcontext)); + +typedef SM_RPOOL_RFREE_T *SM_RPOOL_ATTACH_T; + +typedef struct sm_resource SM_RESOURCE_T; +struct sm_resource +{ + /* + ** Function for freeing this resource. It may be NULL, + ** meaning that this resource has already been freed. + */ + + SM_RPOOL_RFREE_T sm_rfree; + void *sm_rcontext; /* resource data */ +}; + +# define SM_RLIST_MAX 511 + +typedef struct sm_rlist SM_RLIST_T; +struct sm_rlist +{ + SM_RESOURCE_T sm_rvec[SM_RLIST_MAX]; + SM_RLIST_T *sm_rnext; +}; + +typedef struct +{ + /* Points to SmRpoolMagic, or is NULL if rpool is freed. */ + const char *sm_magic; + + /* + ** If this rpool object has no parent, then sm_parentlink + ** is NULL. Otherwise, we set *sm_parentlink = NULL + ** when this rpool is freed, so that it isn't freed a + ** second time when the parent is freed. + */ + + SM_RPOOL_RFREE_T *sm_parentlink; + + /* + ** Memory pools + */ + + /* Size of the next pool to be allocated, not including the header. */ + size_t sm_poolsize; + + /* + ** If an sm_rpool_malloc_x request is too big to fit + ** in the current pool, and the request size > bigobjectsize, + ** then the object will be given its own malloc'ed block. + ** sm_bigobjectsize <= sm_poolsize. The maximum wasted space + ** at the end of a pool is maxpooledobjectsize - 1. + */ + + size_t sm_bigobjectsize; + + /* Points to next free byte in the current pool. */ + char *sm_poolptr; + + /* + ** Number of bytes available in the current pool. + ** Initially 0. Set to 0 by sm_rpool_free. + */ + + size_t sm_poolavail; + + /* Linked list of memory pools. Initially NULL. */ + SM_POOLLINK_T *sm_pools; + + /* + ** Resource lists + */ + + SM_RESOURCE_T *sm_rptr; /* Points to next free resource slot. */ + + /* + ** Number of available resource slots in current list. + ** Initially 0. Set to 0 by sm_rpool_free. + */ + + size_t sm_ravail; + + /* Linked list of resource lists. Initially NULL. */ + SM_RLIST_T *sm_rlists; + +#if _FFR_PERF_RPOOL + int sm_nbigblocks; + int sm_npools; +#endif /* _FFR_PERF_RPOOL */ + +} SM_RPOOL_T; + +extern SM_RPOOL_T * +sm_rpool_new_x __P(( + SM_RPOOL_T *_parent)); + +extern void +sm_rpool_free __P(( + SM_RPOOL_T *_rpool)); + +# if SM_HEAP_CHECK +extern void * +sm_rpool_malloc_tagged_x __P(( + SM_RPOOL_T *_rpool, + size_t _size, + char *_file, + int _line, + int _group)); +# define sm_rpool_malloc_x(rpool, size) \ + sm_rpool_malloc_tagged_x(rpool, size, __FILE__, __LINE__, SmHeapGroup) +extern void * +sm_rpool_malloc_tagged __P(( + SM_RPOOL_T *_rpool, + size_t _size, + char *_file, + int _line, + int _group)); +# define sm_rpool_malloc(rpool, size) \ + sm_rpool_malloc_tagged(rpool, size, __FILE__, __LINE__, SmHeapGroup) +# else /* SM_HEAP_CHECK */ +extern void * +sm_rpool_malloc_x __P(( + SM_RPOOL_T *_rpool, + size_t _size)); +extern void * +sm_rpool_malloc __P(( + SM_RPOOL_T *_rpool, + size_t _size)); +# endif /* SM_HEAP_CHECK */ + +# define sm_rpool_strdup_x(rpool, str) \ + strcpy(sm_rpool_malloc_x(rpool, strlen(str) + 1), str) + +extern SM_RPOOL_ATTACH_T +sm_rpool_attach_x __P(( + SM_RPOOL_T *_rpool, + SM_RPOOL_RFREE_T _rfree, + void *_rcontext)); + +# define sm_rpool_detach(a) ((void)(*(a) = NULL)) + +extern void +sm_rpool_setsizes __P(( + SM_RPOOL_T *_rpool, + size_t _poolsize, + size_t _bigobjectsize)); + +#endif /* ! SM_RPOOL_H */ |
