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lib/clicon/clicon_chunk.h

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+/*
+ *
+  Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
+
+  This file is part of CLICON.
+
+  CLICON 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; either version 3 of the License, or
+  (at your option) any later version.
+
+  CLICON 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 CLICON; see the file COPYING.  If not, see
+  <http://www.gnu.org/licenses/>.
+
+ *
+ * Copyright (C) 2002 Benny Holmgren, All rights reserved
+ */
+
+#ifndef _CLICON_CHUNK_H_
+#define _CLICON_CHUNK_H_
+
+
+/*
+
+ * Compile with chunk diagnostics. XXX Should be in Makefile.in ??
+ */
+#define CHUNK_DIAG
+
+/*
+ * Base number of bits to shift getting the size of a chunk_head.
+ */
+#define CHUNK_BASE	6
+
+/*
+ * Number of predefined chunk sizes. I.e. the number of chunk heads in the
+ * chunk_heads vector. 
+ */
+#define CHUNK_HEADS	(32 - CHUNK_BASE)
+
+
+#ifdef CHUNK_DIAG
+/*
+ * Chunk diagnostics
+ */
+typedef struct _chunk_diag_t {
+	const char     *cd_file;	/* File which requested chunk */
+
+	int		cd_line;	/* Line in requesting file */
+
+} chunk_diag_t;
+#endif /* CHUNK_DIAG */
+
+/*
+ * The block header.
+ */
+struct _chunk_head_t;
+typedef struct _chunk_head_t chunk_head_t;
+
+typedef struct _chunk_block_t {
+	qelem_t		cb_qelem;	/* Circular queue of blocks */
+
+	chunk_head_t   *cb_head;	/* The chunk head I belong to */
+
+	void	       *cb_blk;		/* Allocated memory block */
+
+	uint16_t	cb_ref;		/* Number of used chunks of block */
+	
+} chunk_block_t;
+
+
+/*
+ * The chunk header.
+ */
+struct _chunk_grpent_t;
+typedef struct _chunk_grpent_t chunk_grpent_t;
+typedef struct _chunk_t {
+	qelem_t		c_qelem;	/* Circular queue of chunks */
+
+	chunk_block_t  *c_blk;		/* The block I belong to */
+
+#ifdef CHUNK_DIAG
+    	chunk_diag_t	c_diag;		/* The diagnostics structure */
+#endif /* CHUNK_DIAG */
+
+	chunk_grpent_t *c_grpent;
+} chunk_t;
+
+/*
+ * The head of a chunk size. Each predefined size has it's own head keeping
+ * track of all blocks and chunks for the size.
+ */
+struct _chunk_head_t {
+	size_t		ch_size;	/* Chunk size */
+	int		ch_nchkperblk;	/* Number pf chunks per block */
+
+	size_t		ch_blksz;	/* Size of a block */
+	int		ch_nblks;	/* Number of allocated blocks */
+
+	chunk_block_t  *ch_blks;	/* Circular list of blocks */
+
+	chunk_t	       *ch_cnks;	/* Circular list of chunks in use */
+
+	size_t		ch_nfree;	/* Number of free chunks */
+	chunk_t	       *ch_free;	/* Circular list of free chunks */
+
+};
+
+
+/*
+ * The chunk group structure.
+ */
+typedef struct _chunk_group_t {
+	qelem_t		cg_qelem;	/* List of chunk groups */
+	
+	char           *cg_name;	/* Name of group */
+	
+	chunk_grpent_t *cg_ent;		/* List of chunks in the group */
+
+} chunk_group_t;
+
+
+/*
+ * The chunk group entry structure.
+ */
+struct _chunk_grpent_t {
+	qelem_t		ce_qelem;	/* Circular list of entries */
+	
+	chunk_group_t  *ce_grp;		/* The group I belong to */
+
+	chunk_t	       *ce_cnk;		/* Pointer to the chunk */
+}; 
+
+/*
+ * Public function declarations
+ */
+#ifdef CHUNK_DIAG
+void   *_chunk (size_t, const char *, const char *, int);
+#define chunk(siz,label)	_chunk((siz),(label),__FILE__,__LINE__)
+void   *_rechunk (void *, size_t, const char *, const char *, int);
+#define rechunk(ptr,siz,label)	_rechunk((ptr),(siz),(label),__FILE__,__LINE__)
+void   *_chunkdup (const void *, size_t, const char *, const char *, int);
+#define chunkdup(ptr,siz,label)	_chunkdup((ptr),(siz),(label),__FILE__,__LINE__)
+char   *_chunk_strncat (const char *, const char *, size_t, const char *, const char *, int);
+#define chunk_strncat(str,new,n,label) _chunk_strncat((str),(new),(n),(label),__FILE__,__LINE__)
+char   *_chunk_sprintf (const char *, const char *, int, const char *, ...);
+#define chunk_sprintf(label,fmt,...) _chunk_sprintf((label),__FILE__,__LINE__,(fmt),__VA_ARGS__)
+#else /* CHUNK_DIAG */
+void   *chunk (size_t, const char *);
+void   *rechunk (void *, size_t, const char *);
+void   *chunkdup (void *, size_t, const char *);
+char   *chunk_strncat (const char *, const char *, size_t, const char *);
+char   *chunk_sprintf (const char *, char *, ...);
+#endif /* CHUNK_DIAG */
+void	unchunk (void *);
+void	unchunk_group (const char *);
+void	chunk_check (FILE *, const char *);
+size_t	chunksize (void *);
+
+
+#endif	/* _CLICON_CHUNK_H_ */