Copyright 1990, 1991, 1992 Free Software Foundation
Written May 1989 by Mike Haertel.
- Heavily modified Mar 1992 by Fred Fish. (fnf@cygnus.com)
+ Heavily modified Mar 1992 by Fred Fish. (fnf@cygnus.com) */
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library 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
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.
-
- The author may be reached (Email) at the address mike@ai.mit.edu,
- or (US mail) as Mike Haertel c/o Free Software Foundation. */
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef __MMPRIVATE_H
#define __MMPRIVATE_H 1
-#include "mmalloc.h"
+#include "portable.h"
+#include "xbt/xbt_os_thread.h"
+#include "xbt/mmalloc.h"
+#include <semaphore.h>
#ifdef HAVE_LIMITS_H
# include <limits.h>
# define MIN(A, B) ((A) < (B) ? (A) : (B))
#endif
-#define MMALLOC_MAGIC "mmalloc" /* Mapped file magic number */
-#define MMALLOC_MAGIC_SIZE 8 /* Size of magic number buf */
-#define MMALLOC_VERSION 1 /* Current mmalloc version */
-#define MMALLOC_KEYS 16 /* Keys for application use */
+#define MMALLOC_MAGIC "mmalloc" /* Mapped file magic number */
+#define MMALLOC_MAGIC_SIZE 8 /* Size of magic number buf */
+#define MMALLOC_VERSION 1 /* Current mmalloc version */
+#define MMALLOC_KEYS 16 /* Keys for application use */
/* The allocator divides the heap into blocks of fixed size; large
requests receive one or more whole blocks, and small requests
#define BLOCK(A) (((char*) (A) - (char*) mdp -> heapbase) / BLOCKSIZE + 1)
-#define ADDRESS(B) ((PTR) (((ADDR2UINT(B)) - 1) * BLOCKSIZE + (char*) mdp -> heapbase))
+#define ADDRESS(B) ((void*) (((ADDR2UINT(B)) - 1) * BLOCKSIZE + (char*) mdp -> heapbase))
-/* Data structure giving per-block information. */
+const char *xbt_thread_self_name(void);
-typedef union
- {
- /* Heap information for a busy block. */
- struct
- {
- /* Zero for a large block, or positive giving the
- logarithm to the base two of the fragment size. */
- int type;
- union
- {
- struct
- {
- size_t nfree; /* Free fragments in a fragmented block. */
- size_t first; /* First free fragment of the block. */
- } frag;
- /* Size (in blocks) of a large cluster. */
- size_t size;
- } info;
- } busy;
- /* Heap information for a free block (that may be the first of
- a free cluster). */
- struct
- {
- size_t size; /* Size (in blocks) of a free cluster. */
- size_t next; /* Index of next free cluster. */
- size_t prev; /* Index of previous free cluster. */
- } free;
- } malloc_info;
+/* Data structure giving per-block information. */
+typedef union {
+ /* Heap information for a busy block. */
+ struct {
+ /* Zero for a large block, or positive giving the
+ logarithm to the base two of the fragment size. */
+ int type;
+ union {
+ struct {
+ size_t nfree; /* Free fragments in a fragmented block. */
+ size_t first; /* First free fragment of the block. */
+ } frag;
+ struct {
+ size_t size; /* Size (in blocks) of a large cluster. */
+ size_t busy_size;
+ } block;
+ } info;
+ } busy;
+ /* Heap information for a free block (that may be the first of
+ a free cluster). */
+ struct {
+ size_t size; /* Size (in blocks) of a free cluster. */
+ size_t next; /* Index of next free cluster. */
+ size_t prev; /* Index of previous free cluster. */
+ } free;
+} malloc_info;
/* List of blocks allocated with `mmemalign' (or `mvalloc'). */
-struct alignlist
- {
- struct alignlist *next;
- PTR aligned; /* The address that mmemaligned returned. */
- PTR exact; /* The address that malloc returned. */
- };
+struct alignlist {
+ struct alignlist *next;
+ void *aligned; /* The address that mmemaligned returned. */
+ void *exact; /* The address that malloc returned. */
+};
/* Doubly linked lists of free fragments. */
-struct list
- {
- struct list *next;
- struct list *prev;
- };
+struct list {
+ struct list *next;
+ struct list *prev;
+};
/* Statistics available to the user.
FIXME: By design, the internals of the malloc package are no longer
to be via some other mechanism, such as mmstat_<something> where the
return value is the <something> the user is interested in. */
-struct mstats
- {
- size_t bytes_total; /* Total size of the heap. */
- size_t chunks_used; /* Chunks allocated by the user. */
- size_t bytes_used; /* Byte total of user-allocated chunks. */
- size_t chunks_free; /* Chunks in the free list. */
- size_t bytes_free; /* Byte total of chunks in the free list. */
- };
+struct mstats {
+ size_t bytes_total; /* Total size of the heap. */
+ size_t chunks_used; /* Chunks allocated by the user. */
+ size_t bytes_used; /* Byte total of user-allocated chunks. */
+ size_t chunks_free; /* Chunks in the free list. */
+ size_t bytes_free; /* Byte total of chunks in the free list. */
+};
/* Internal structure that defines the format of the malloc-descriptor.
This gets written to the base address of the region that mmalloc is
managing, and thus also becomes the file header for the mapped file,
if such a file exists. */
-struct mdesc
-{
- /* The "magic number" for an mmalloc file. */
+struct mdesc {
+ /* Semaphore locking the access to the heap */
+ sem_t sem;
+
+ /* Number of processes that attached the heap */
+ unsigned int refcount;
+
+ /* Chained lists of mdescs */
+ struct mdesc *next_mdesc;
+
+ /* The "magic number" for an mmalloc file. */
char magic[MMALLOC_MAGIC_SIZE];
/* The size in bytes of this structure, used as a sanity check when reusing
a previously created mapped file. */
-
unsigned int headersize;
/* The version number of the mmalloc package that created this file. */
-
unsigned char version;
/* Some flag bits to keep track of various internal things. */
-
unsigned int flags;
/* If a system call made by the mmalloc package fails, the errno is
preserved for future examination. */
-
int saved_errno;
/* Pointer to the function that is used to get more core, or return core
FIXME: For mapped regions shared by more than one process, this
needs to be maintained on a per-process basis. */
+ void *(*morecore) (struct mdesc * mdp, int size);
- PTR (*morecore) PARAMS ((struct mdesc *, int));
-
/* Pointer to the function that causes an abort when the memory checking
features are activated. By default this is set to abort(), but can
be set to another function by the application using mmalloc().
FIXME: For mapped regions shared by more than one process, this
needs to be maintained on a per-process basis. */
-
- void (*abortfunc) PARAMS ((void));
+ void (*abortfunc) (void);
/* Debugging hook for free.
FIXME: For mapped regions shared by more than one process, this
needs to be maintained on a per-process basis. */
-
- void (*mfree_hook) PARAMS ((PTR, PTR));
+ void (*mfree_hook) (void *mdp, void *ptr);
/* Debugging hook for `malloc'.
FIXME: For mapped regions shared by more than one process, this
needs to be maintained on a per-process basis. */
-
- PTR (*mmalloc_hook) PARAMS ((PTR, size_t));
+ void *(*mmalloc_hook) (void *mdp, size_t size);
/* Debugging hook for realloc.
FIXME: For mapped regions shared by more than one process, this
needs to be maintained on a per-process basis. */
-
- PTR (*mrealloc_hook) PARAMS ((PTR, PTR, size_t));
+ void *(*mrealloc_hook) (void *mdp, void *ptr, size_t size);
/* Number of info entries. */
-
size_t heapsize;
/* Pointer to first block of the heap (base of the first block). */
-
- PTR heapbase;
+ void *heapbase;
/* Current search index for the heap table. */
/* Search index in the info table. */
-
size_t heapindex;
/* Limit of valid info table indices. */
-
size_t heaplimit;
/* Block information table.
is the location where the bookkeeping data for mmap and for malloc
begins. */
- PTR base;
+ void *base;
/* The current location in the memory region for this malloc heap which
represents the end of memory in use. */
- PTR breakval;
+ void *breakval;
/* The end of the current memory region for this malloc heap. This is
the first location past the end of mapped memory. */
- PTR top;
+ void *top;
/* Open file descriptor for the file to which this malloc heap is mapped.
This will always be a valid file descriptor, since /dev/zero is used
/* An array of keys to data within the mapped region, for use by the
application. */
- PTR keys[MMALLOC_KEYS];
+ void *keys[MMALLOC_KEYS];
};
-/* Bits to look at in the malloc descriptor flags word */
+int mmalloc_compare_heap(void *h1, void *h2, void *std_heap_addr);
-#define MMALLOC_DEVZERO (1 << 0) /* Have mapped to /dev/zero */
-#define MMALLOC_ANONYMOUS (1 << 1) /* Use anonymous mapping */
-#define MMALLOC_INITIALIZED (1 << 2) /* Initialized mmalloc */
-#define MMALLOC_MMCHECK_USED (1 << 3) /* mmcheckf() called already */
+int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap_addr);
-/* Internal version of `mfree' used in `morecore'. */
+void mmalloc_display_info(void *h);
+
+/* Bits to look at in the malloc descriptor flags word */
-extern void __mmalloc_free PARAMS ((struct mdesc *, PTR));
+#define MMALLOC_DEVZERO (1 << 0) /* Have mapped to /dev/zero */
+#define MMALLOC_ANONYMOUS (1 << 1) /* Use anonymous mapping */
+#define MMALLOC_INITIALIZED (1 << 2) /* Initialized mmalloc */
+#define MMALLOC_MMCHECK_USED (1 << 3) /* mmcheckf() called already */
-/* Hooks for debugging versions. */
+/* Internal version of `mfree' used in `morecore'. */
-extern void (*__mfree_hook) PARAMS ((PTR, PTR));
-extern PTR (*__mmalloc_hook) PARAMS ((PTR, size_t));
-extern PTR (*__mrealloc_hook) PARAMS ((PTR, PTR, size_t));
+extern void __mmalloc_free(struct mdesc *mdp, void *ptr);
/* A default malloc descriptor for the single sbrk() managed region. */
/* Initialize the first use of the default malloc descriptor, which uses
an sbrk() region. */
-extern struct mdesc *__mmalloc_sbrk_init PARAMS ((void));
+extern struct mdesc *__mmalloc_create_default_mdp(void);
/* Grow or shrink a contiguous mapped region using mmap().
- Works much like sbrk() */
+ Works much like sbrk(), only faster */
-#if defined(HAVE_MMAP)
+extern void *__mmalloc_mmap_morecore(struct mdesc *mdp, int size);
-extern PTR __mmalloc_mmap_morecore PARAMS ((struct mdesc *, int));
-
-#endif
/* Remap a mmalloc region that was previously mapped. */
-extern PTR __mmalloc_remap_core PARAMS ((struct mdesc *));
+extern void *__mmalloc_remap_core(struct mdesc *mdp);
/* Macro to convert from a user supplied malloc descriptor to pointer to the
internal malloc descriptor. If the user supplied descriptor is NULL, then
#define MD_TO_MDP(md) \
((md) == NULL \
- ? (__mmalloc_default_mdp == NULL \
- ? __mmalloc_sbrk_init () \
- : __mmalloc_default_mdp) \
+ ? __mmalloc_default_mdp \
: (struct mdesc *) (md))
-#endif /* __MMPRIVATE_H */
+/* Thread-safety (if the sem is already created)*/
+#define LOCK(md) \
+ do {\
+ struct mdesc *lock_local_mdp = MD_TO_MDP(md); \
+ sem_wait(&lock_local_mdp->sem); \
+ } while (0)
+
+#define UNLOCK(md) \
+ do { \
+ struct mdesc *unlock_local_mdp = MD_TO_MDP(md); \
+ sem_post(&unlock_local_mdp->sem); \
+ } while (0)
+
+#endif /* __MMPRIVATE_H */
