Ichthyostega
36cfaaa14d
The new implementation provides differentiated buffers, but is still buggy and causes double free alarms on shutdown See Ticket #683
120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/*
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tmpbuf.c - Round Robin Temporary buffers
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Copyright (C) Lumiera.org
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2008, 2010 Christian Thaeter <ct@pipapo.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef LUMIERA_TMPBUF_H
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#define LUMIERA_TMPBUF_H
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#include <stdlib.h>
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/**
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* @file
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* Round robin temporary buffers.
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* This provides some buffers per thread which are round-robin recycled with each use.
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* The idea is to have fast buffers for temporal data without need for explicit heap management.
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*
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* @warning this is the restored old version from bc989dab7a97fc69c (July 2010)
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* (the improved version is still buggy as of 5/2011)
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*/
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/* following value must be exponent of 2 */
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/**
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* Number of buffers in the ring
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* This also defines how many concurent buffers can be in use in one thread (including nested calls)
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* tmpbufs are only suitable for nested calls where one knows in advance how much tmpbufs might be used
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*/
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#define LUMIERA_TMPBUF_NUM 16
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/**
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* free all buffers associated with this thread.
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* This function is called automatically, usually one doesnt need to call it.
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*/
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void
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lumiera_tmpbuf_freeall (void);
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/**
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* Query a thread local tmpbuf.
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* @param size minimal needed size for the tmpbuf
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* @return the tmpbuf
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*/
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void*
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lumiera_tmpbuf_provide (size_t size);
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/**
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* Duplicate string to a tmpbuf.
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* @param src string to be duplicated
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* @param size maximal length to be copied
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* @return temporary buffer containing a copy of the string
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*/
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char*
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lumiera_tmpbuf_strndup (const char* src, size_t size);
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/**
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* Construct a string in a tmpbuf.
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* @param size maximal length for the string
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* @param fmt printf like formatstring
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* @param ... parameters
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* @return temporary buffer containing the constructed of the string
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*/
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char*
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lumiera_tmpbuf_snprintf (size_t size, const char* fmt, ...);
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/**
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* Concat up to 3 strings in a tmpbuf.
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* @param str1 first string to concat or NULL
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* @param str1_len how much of the first string shall be used
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* @param str2 second string to concat or NULL
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* @param str2_len how much of the second string shall be used
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* @param str3 third string to concat or NULL
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* @param str3_len how much of the third string shall be used
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* @return temporary buffer containing the constructed of the string
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*/
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char*
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lumiera_tmpbuf_strcat3 (const char* str1, size_t str1_len,
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const char* str2, size_t str2_len,
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const char* str3, size_t str3_len);
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/**
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* Translates characters in a string, similar to the shell 'tr' utility
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* @param in input string to be translated
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* @param from source character set
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* @param to destination character set
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* @param def default destination character when a character is not in the source set,
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* when NULL then translation will abort on unknown characters and return NULL,
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* when "" then unknown characters will be removed
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* when set to a single character string, unknown characters will be replaced with this character
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* @return temporary buffer containing the constructed of the string
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*/
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char*
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lumiera_tmpbuf_tr (const char* in, const char* from, const char* to, const char* def);
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#endif
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/*
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// Local Variables:
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// mode: C
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// c-file-style: "gnu"
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// indent-tabs-mode: nil
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// End:
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*/
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