+++ /dev/null
-/* malloc.c -- Implementation File (module.c template V1.0)
- Copyright (C) 1995 Free Software Foundation, Inc.
- Contributed by James Craig Burley.
-
-This file is part of GNU Fortran.
-
-GNU Fortran 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 2, or (at your option)
-any later version.
-
-GNU Fortran 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 GNU Fortran; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
-
- Related Modules:
- None
-
- Description:
- Fast pool-based memory allocation.
-
- Modifications:
-*/
-
-/* Include files. */
-
-#include "proj.h"
-#include "malloc.h"
-
-/* Externals defined here. */
-
-struct _malloc_root_ malloc_root_
-=
-{
- {
- &malloc_root_.malloc_pool_image_,
- &malloc_root_.malloc_pool_image_,
- (mallocPool) &malloc_root_.malloc_pool_image_.eldest,
- (mallocPool) &malloc_root_.malloc_pool_image_.eldest,
- (mallocArea_) &malloc_root_.malloc_pool_image_.first,
- (mallocArea_) &malloc_root_.malloc_pool_image_.first,
- 0,
-#if MALLOC_DEBUG
- 0, 0, 0, 0, 0, 0, 0, { '/' }
-#else
- { 0 }
-#endif
- },
-};
-
-/* Simple definitions and enumerations. */
-
-
-/* Internal typedefs. */
-
-
-/* Private include files. */
-
-
-/* Internal structure definitions. */
-
-
-/* Static objects accessed by functions in this module. */
-
-static void *malloc_reserve_ = NULL; /* For crashes. */
-#if MALLOC_DEBUG
-static const char *const malloc_types_[] =
-{"KS", "KSR", "NF", "NFR", "US", "USR"};
-#endif
-
-/* Static functions (internal). */
-
-static void malloc_kill_area_ (mallocPool pool, mallocArea_ a);
-#if MALLOC_DEBUG
-static void malloc_verify_area_ (mallocPool pool, mallocArea_ a);
-#endif
-
-/* Internal macros. */
-
-#if MALLOC_DEBUG
-#define malloc_kill_(ptr,s) do {memset((ptr),127,(s));free((ptr));} while(0)
-#else
-#define malloc_kill_(ptr,s) free((ptr))
-#endif
-\f
-/* malloc_kill_area_ -- Kill storage area and its object
-
- malloc_kill_area_(mallocPool pool,mallocArea_ area);
-
- Does the actual killing of a storage area. */
-
-static void
-malloc_kill_area_ (mallocPool pool UNUSED, mallocArea_ a)
-{
-#if MALLOC_DEBUG
- assert (strcmp (a->name, ((char *) (a->where)) + a->size) == 0);
-#endif
- malloc_kill_ (a->where, a->size);
- a->next->previous = a->previous;
- a->previous->next = a->next;
-#if MALLOC_DEBUG
- pool->freed += a->size;
- pool->frees++;
-#endif
- malloc_kill_ (a,
- offsetof (struct _malloc_area_, name)
- + strlen (a->name) + 1);
-}
-
-/* malloc_verify_area_ -- Verify storage area and its object
-
- malloc_verify_area_(mallocPool pool,mallocArea_ area);
-
- Does the actual verifying of a storage area. */
-
-#if MALLOC_DEBUG
-static void
-malloc_verify_area_ (mallocPool pool UNUSED, mallocArea_ a UNUSED)
-{
- mallocSize s = a->size;
-
- assert (strcmp (a->name, ((char *) (a->where)) + s) == 0);
-}
-#endif
-
-/* malloc_init -- Initialize malloc cluster
-
- malloc_init();
-
- Call malloc_init before you do anything else. */
-
-void
-malloc_init ()
-{
- if (malloc_reserve_ != NULL)
- return;
- malloc_reserve_ = xmalloc (20 * 1024); /* In case of crash, free this first. */
-}
-
-/* malloc_pool_display -- Display a pool
-
- mallocPool p;
- malloc_pool_display(p);
-
- Displays information associated with the pool and its subpools. */
-
-void
-malloc_pool_display (mallocPool p UNUSED)
-{
-#if MALLOC_DEBUG
- mallocPool q;
- mallocArea_ a;
-
- fprintf (dmpout, "Pool \"%s\": bytes allocated=%lu, freed=%lu, old sizes=%lu, new sizes\
-=%lu,\n allocations=%lu, frees=%lu, resizes=%lu, uses=%lu\n Subpools:\n",
- p->name, p->allocated, p->freed, p->old_sizes, p->new_sizes, p->allocations,
- p->frees, p->resizes, p->uses);
-
- for (q = p->eldest; q != (mallocPool) & p->eldest; q = q->next)
- fprintf (dmpout, " \"%s\"\n", q->name);
-
- fprintf (dmpout, " Storage areas:\n");
-
- for (a = p->first; a != (mallocArea_) & p->first; a = a->next)
- {
- fprintf (dmpout, " ");
- malloc_display_ (a);
- }
-#endif
-}
-
-/* malloc_pool_kill -- Destroy a pool
-
- mallocPool p;
- malloc_pool_kill(p);
-
- Releases all storage associated with the pool and its subpools. */
-
-void
-malloc_pool_kill (mallocPool p)
-{
- mallocPool q;
- mallocArea_ a;
-
- if (--p->uses != 0)
- return;
-
-#if 0
- malloc_pool_display (p);
-#endif
-
- assert (p->next->previous == p);
- assert (p->previous->next == p);
-
- /* Kill off all the subpools. */
-
- while ((q = p->eldest) != (mallocPool) &p->eldest)
- {
- q->uses = 1; /* Force the kill. */
- malloc_pool_kill (q);
- }
-
- /* Now free all the storage areas. */
-
- while ((a = p->first) != (mallocArea_) & p->first)
- {
- malloc_kill_area_ (p, a);
- }
-
- /* Now remove from list of sibling pools. */
-
- p->next->previous = p->previous;
- p->previous->next = p->next;
-
- /* Finally, free the pool itself. */
-
- malloc_kill_ (p,
- offsetof (struct _malloc_pool_, name)
- + strlen (p->name) + 1);
-}
-
-/* malloc_pool_new -- Make a new pool
-
- mallocPool p;
- p = malloc_pool_new("My new pool",malloc_pool_image(),1024);
-
- Makes a new pool with the given name and default new-chunk allocation. */
-
-mallocPool
-malloc_pool_new (const char *name, mallocPool parent,
- unsigned long chunks UNUSED)
-{
- mallocPool p;
-
- if (parent == NULL)
- parent = malloc_pool_image ();
-
- p = malloc_new_ (offsetof (struct _malloc_pool_, name)
- + (MALLOC_DEBUG ? strlen (name) + 1 : 0));
- p->next = (mallocPool) &(parent->eldest);
- p->previous = parent->youngest;
- parent->youngest->next = p;
- parent->youngest = p;
- p->eldest = (mallocPool) &(p->eldest);
- p->youngest = (mallocPool) &(p->eldest);
- p->first = (mallocArea_) &(p->first);
- p->last = (mallocArea_) &(p->first);
- p->uses = 1;
-#if MALLOC_DEBUG
- p->allocated = p->freed = p->old_sizes = p->new_sizes = p->allocations
- = p->frees = p->resizes = 0;
- strcpy (p->name, name);
-#endif
- return p;
-}
-
-/* malloc_pool_use -- Use an existing pool
-
- mallocPool p;
- p = malloc_pool_new(pool);
-
- Increments use count for pool; means a matching malloc_pool_kill must
- be performed before a subsequent one will actually kill the pool. */
-
-mallocPool
-malloc_pool_use (mallocPool pool)
-{
- ++pool->uses;
- return pool;
-}
-
-/* malloc_display_ -- Display info on a mallocArea_
-
- mallocArea_ a;
- malloc_display_(a);
-
- Simple. */
-
-void
-malloc_display_ (mallocArea_ a UNUSED)
-{
-#if MALLOC_DEBUG
- fprintf (dmpout, "At %08lX, size=%" mallocSize_f "u, type=%s, \"%s\"\n",
- (unsigned long) a->where, a->size, malloc_types_[a->type], a->name);
-#endif
-}
-
-/* malloc_find_inpool_ -- Find mallocArea_ for object in pool
-
- mallocPool pool;
- void *ptr;
- mallocArea_ a;
- a = malloc_find_inpool_(pool,ptr);
-
- Search for object in list of mallocArea_s, die if not found. */
-
-mallocArea_
-malloc_find_inpool_ (mallocPool pool, void *ptr)
-{
- mallocArea_ a;
- mallocArea_ b = (mallocArea_) &pool->first;
- int n = 0;
-
- for (a = pool->first; a != (mallocArea_) &pool->first; a = a->next)
- {
- assert (("Infinite loop detected" != NULL) && (a != b));
- if (a->where == ptr)
- return a;
- ++n;
- if (n & 1)
- b = b->next;
- }
- assert ("Couldn't find object in pool!" == NULL);
- return NULL;
-}
-
-/* malloc_kill_inpool_ -- Kill object
-
- malloc_kill_inpool_(NULL,MALLOC_typeUS_,ptr,size_in_bytes);
-
- Find the mallocArea_ for the pointer, make sure the type is proper, and
- kill both of them. */
-
-void
-malloc_kill_inpool_ (mallocPool pool, mallocType_ type UNUSED,
- void *ptr, mallocSize s UNUSED)
-{
- mallocArea_ a;
-
- if (pool == NULL)
- pool = malloc_pool_image ();
-
-#if MALLOC_DEBUG
- assert ((pool == malloc_pool_image ())
- || malloc_pool_find_ (pool, malloc_pool_image ()));
-#endif
-
- a = malloc_find_inpool_ (pool, ptr);
-#if MALLOC_DEBUG
- assert (a->type == type);
- if ((type != MALLOC_typeUS_) && (type != MALLOC_typeUSR_))
- assert (a->size == s);
-#endif
- malloc_kill_area_ (pool, a);
-}
-
-/* malloc_new_ -- Allocate new object, die if unable
-
- ptr = malloc_new_(size_in_bytes);
-
- Call malloc, bomb if it returns NULL. */
-
-void *
-malloc_new_ (mallocSize s)
-{
- void *ptr;
- unsigned ss = s;
-
-#if MALLOC_DEBUG && 0
- assert (s == (mallocSize) ss);/* Else alloc is too big for this
- library/sys. */
-#endif
-
- ptr = xmalloc (ss);
-#if MALLOC_DEBUG
- memset (ptr, 126, ss); /* Catch some kinds of errors more
- quickly/reliably. */
-#endif
- return ptr;
-}
-
-/* malloc_new_inpool_ -- Allocate new object, die if unable
-
- ptr = malloc_new_inpool_(NULL,MALLOC_typeUS_,"object",size_in_bytes);
-
- Allocate the structure and allocate a mallocArea_ to describe it, then
- add it to the list of mallocArea_s for the pool. */
-
-void *
-malloc_new_inpool_ (mallocPool pool, mallocType_ type, const char *name, mallocSize s)
-{
- void *ptr;
- mallocArea_ a;
- unsigned short i;
-
- if (pool == NULL)
- pool = malloc_pool_image ();
-
-#if MALLOC_DEBUG
- assert ((pool == malloc_pool_image ())
- || malloc_pool_find_ (pool, malloc_pool_image ()));
-#endif
-
- ptr = malloc_new_ (s + (i = (MALLOC_DEBUG ? strlen (name) + 1 : 0)));
-#if MALLOC_DEBUG
- strcpy (((char *) (ptr)) + s, name);
-#endif
- a = malloc_new_ (offsetof (struct _malloc_area_, name) + i);
- switch (type)
- { /* A little optimization to speed up killing
- of non-permanent stuff. */
- case MALLOC_typeKP_:
- case MALLOC_typeKPR_:
- a->next = (mallocArea_) &pool->first;
- break;
-
- default:
- a->next = pool->first;
- break;
- }
- a->previous = a->next->previous;
- a->next->previous = a;
- a->previous->next = a;
- a->where = ptr;
-#if MALLOC_DEBUG
- a->size = s;
- a->type = type;
- strcpy (a->name, name);
- pool->allocated += s;
- pool->allocations++;
-#endif
- return ptr;
-}
-
-/* malloc_new_zinpool_ -- Allocate new zeroed object, die if unable
-
- ptr = malloc_new_zinpool_(NULL,MALLOC_typeUS_,"object",size_in_bytes,0);
-
- Like malloc_new_inpool_, but zeros out all the bytes in the area (assuming
- you pass it a 0). */
-
-void *
-malloc_new_zinpool_ (mallocPool pool, mallocType_ type, const char *name, mallocSize s,
- int z)
-{
- void *ptr;
-
- ptr = malloc_new_inpool_ (pool, type, name, s);
- memset (ptr, z, s);
- return ptr;
-}
-
-/* malloc_pool_find_ -- See if pool is a descendant of another pool
-
- if (malloc_pool_find_(target_pool,parent_pool)) ...;
-
- Recursive descent on each of the children of the parent pool, after
- first checking the children themselves. */
-
-char
-malloc_pool_find_ (mallocPool pool, mallocPool parent)
-{
- mallocPool p;
-
- for (p = parent->eldest; p != (mallocPool) & parent->eldest; p = p->next)
- {
- if ((p == pool) || malloc_pool_find_ (pool, p))
- return 1;
- }
- return 0;
-}
-
-/* malloc_resize_inpool_ -- Resize existing object in pool
-
- ptr = malloc_resize_inpool_(NULL,MALLOC_typeUSR_,ptr,new_size,old_size);
-
- Find the object's mallocArea_, check it out, then do the resizing. */
-
-void *
-malloc_resize_inpool_ (mallocPool pool, mallocType_ type UNUSED,
- void *ptr, mallocSize ns, mallocSize os UNUSED)
-{
- mallocArea_ a;
-
- if (pool == NULL)
- pool = malloc_pool_image ();
-
-#if MALLOC_DEBUG
- assert ((pool == malloc_pool_image ())
- || malloc_pool_find_ (pool, malloc_pool_image ()));
-#endif
-
- a = malloc_find_inpool_ (pool, ptr);
-#if MALLOC_DEBUG
- assert (a->type == type);
- if ((type == MALLOC_typeKSR_) || (type == MALLOC_typeKPR_))
- assert (a->size == os);
- assert (strcmp (a->name, ((char *) (ptr)) + os) == 0);
-#endif
- ptr = malloc_resize_ (ptr, ns + (MALLOC_DEBUG ? strlen (a->name) + 1: 0));
- a->where = ptr;
-#if MALLOC_DEBUG
- a->size = ns;
- strcpy (((char *) (ptr)) + ns, a->name);
- pool->old_sizes += os;
- pool->new_sizes += ns;
- pool->resizes++;
-#endif
- return ptr;
-}
-
-/* malloc_resize_ -- Reallocate object, die if unable
-
- ptr = malloc_resize_(ptr,size_in_bytes);
-
- Call realloc, bomb if it returns NULL. */
-
-void *
-malloc_resize_ (void *ptr, mallocSize s)
-{
- int ss = s;
-
-#if MALLOC_DEBUG && 0
- assert (s == (mallocSize) ss);/* Too big if failure here. */
-#endif
-
- ptr = xrealloc (ptr, ss);
- return ptr;
-}
-
-/* malloc_verify_inpool_ -- Verify object
-
- Find the mallocArea_ for the pointer, make sure the type is proper, and
- verify both of them. */
-
-void
-malloc_verify_inpool_ (mallocPool pool UNUSED, mallocType_ type UNUSED,
- void *ptr UNUSED, mallocSize s UNUSED)
-{
-#if MALLOC_DEBUG
- mallocArea_ a;
-
- if (pool == NULL)
- pool = malloc_pool_image ();
-
- assert ((pool == malloc_pool_image ())
- || malloc_pool_find_ (pool, malloc_pool_image ()));
-
- a = malloc_find_inpool_ (pool, ptr);
- assert (a->type == type);
- if ((type != MALLOC_typeUS_) && (type != MALLOC_typeUSR_))
- assert (a->size == s);
- malloc_verify_area_ (pool, a);
-#endif
-}
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