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Editing: lf.h
/* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ #ifndef INCLUDE_LF_INCLUDED #define INCLUDE_LF_INCLUDED #include <my_atomic.h> C_MODE_START /* wait-free dynamic array, see lf_dynarray.c 4 levels of 256 elements each mean 4311810304 elements in an array - it should be enough for a while */ #define LF_DYNARRAY_LEVEL_LENGTH 256 #define LF_DYNARRAY_LEVELS 4 typedef struct { void * volatile level[LF_DYNARRAY_LEVELS]; uint size_of_element; } LF_DYNARRAY; typedef int (*lf_dynarray_func)(void *, void *); void lf_dynarray_init(LF_DYNARRAY *array, uint element_size); void lf_dynarray_destroy(LF_DYNARRAY *array); void *lf_dynarray_value(LF_DYNARRAY *array, uint idx); void *lf_dynarray_lvalue(LF_DYNARRAY *array, uint idx); int lf_dynarray_iterate(LF_DYNARRAY *array, lf_dynarray_func func, void *arg); /* pin manager for memory allocator, lf_alloc-pin.c */ #define LF_PINBOX_PINS 4 #define LF_PURGATORY_SIZE 100 typedef void lf_pinbox_free_func(void *, void *, void*); typedef struct { LF_DYNARRAY pinarray; lf_pinbox_free_func *free_func; void *free_func_arg; uint free_ptr_offset; uint32 volatile pinstack_top_ver; /* this is a versioned pointer */ uint32 volatile pins_in_array; /* number of elements in array */ } LF_PINBOX; typedef struct { void * volatile pin[LF_PINBOX_PINS]; LF_PINBOX *pinbox; void *purgatory; uint32 purgatory_count; uint32 volatile link; /* avoid false sharing */ char pad[CPU_LEVEL1_DCACHE_LINESIZE]; } LF_PINS; /* compile-time assert to make sure we have enough pins. */ #define lf_pin(PINS, PIN, ADDR) \ do { \ compile_time_assert(PIN < LF_PINBOX_PINS); \ my_atomic_storeptr(&(PINS)->pin[PIN], (ADDR)); \ } while(0) #define lf_unpin(PINS, PIN) lf_pin(PINS, PIN, NULL) #define lf_assert_pin(PINS, PIN) assert((PINS)->pin[PIN] != 0) #define lf_assert_unpin(PINS, PIN) assert((PINS)->pin[PIN] == 0) void lf_pinbox_init(LF_PINBOX *pinbox, uint free_ptr_offset, lf_pinbox_free_func *free_func, void * free_func_arg); void lf_pinbox_destroy(LF_PINBOX *pinbox); LF_PINS *lf_pinbox_get_pins(LF_PINBOX *pinbox); void lf_pinbox_put_pins(LF_PINS *pins); void lf_pinbox_free(LF_PINS *pins, void *addr); /* memory allocator, lf_alloc-pin.c */ typedef struct st_lf_allocator { LF_PINBOX pinbox; uchar * volatile top; uint element_size; uint32 volatile mallocs; void (*constructor)(uchar *); /* called, when an object is malloc()'ed */ void (*destructor)(uchar *); /* called, when an object is free()'d */ } LF_ALLOCATOR; void lf_alloc_init(LF_ALLOCATOR *allocator, uint size, uint free_ptr_offset); void lf_alloc_destroy(LF_ALLOCATOR *allocator); uint lf_alloc_pool_count(LF_ALLOCATOR *allocator); /* shortcut macros to access underlying pinbox functions from an LF_ALLOCATOR see lf_pinbox_get_pins() and lf_pinbox_put_pins() */ #define lf_alloc_free(PINS, PTR) lf_pinbox_free((PINS), (PTR)) #define lf_alloc_get_pins(A) lf_pinbox_get_pins(&(A)->pinbox) #define lf_alloc_put_pins(PINS) lf_pinbox_put_pins(PINS) #define lf_alloc_direct_free(ALLOC, ADDR) \ do { \ if ((ALLOC)->destructor) \ (ALLOC)->destructor((uchar*) ADDR); \ my_free(ADDR); \ } while(0) void *lf_alloc_new(LF_PINS *pins); C_MODE_END /* extendible hash, lf_hash.cc */ #include <hash.h> C_MODE_START typedef struct st_lf_hash LF_HASH; typedef void (*lf_hash_initializer)(LF_HASH *hash, void *dst, const void *src); #define LF_HASH_UNIQUE 1 /* lf_hash overhead per element (that is, sizeof(LF_SLIST) */ extern const int LF_HASH_OVERHEAD; struct st_lf_hash { LF_DYNARRAY array; /* hash itself */ LF_ALLOCATOR alloc; /* allocator for elements */ my_hash_get_key get_key; /* see HASH */ lf_hash_initializer initializer; /* called when an element is inserted */ my_hash_function hash_function; /* see HASH */ CHARSET_INFO *charset; /* see HASH */ uint key_offset, key_length; /* see HASH */ uint element_size; /* size of memcpy'ed area on insert */ uint flags; /* LF_HASH_UNIQUE, etc */ int32 volatile size; /* size of array */ int32 volatile count; /* number of elements in the hash */ }; void lf_hash_init(LF_HASH *hash, uint element_size, uint flags, uint key_offset, uint key_length, my_hash_get_key get_key, CHARSET_INFO *charset); void lf_hash_destroy(LF_HASH *hash); int lf_hash_insert(LF_HASH *hash, LF_PINS *pins, const void *data); void *lf_hash_search(LF_HASH *hash, LF_PINS *pins, const void *key, uint keylen); void *lf_hash_search_using_hash_value(LF_HASH *hash, LF_PINS *pins, my_hash_value_type hash_value, const void *key, uint keylen); int lf_hash_delete(LF_HASH *hash, LF_PINS *pins, const void *key, uint keylen); int lf_hash_iterate(LF_HASH *hash, LF_PINS *pins, my_hash_walk_action action, void *argument); #define lf_hash_size(hash) \ my_atomic_load32_explicit(&(hash)->count, MY_MEMORY_ORDER_RELAXED) /* shortcut macros to access underlying pinbox functions from an LF_HASH see lf_pinbox_get_pins() and lf_pinbox_put_pins() */ #define lf_hash_get_pins(HASH) lf_alloc_get_pins(&(HASH)->alloc) #define lf_hash_put_pins(PINS) lf_pinbox_put_pins(PINS) #define lf_hash_search_unpin(PINS) lf_unpin((PINS), 2) /* cleanup */ C_MODE_END #endif
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