--- /dev/null
+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2008 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#ifdef __ia64__
+#include <ucontext.h>
+extern unsigned long * __libc_ia64_register_backing_store_base;
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/eval.h"
+#include "libguile/stime.h"
+#include "libguile/stackchk.h"
+#include "libguile/struct.h"
+#include "libguile/smob.h"
+#include "libguile/unif.h"
+#include "libguile/async.h"
+#include "libguile/ports.h"
+#include "libguile/root.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/weaks.h"
+#include "libguile/hashtab.h"
+#include "libguile/tags.h"
+
+#include "libguile/validate.h"
+#include "libguile/deprecation.h"
+#include "libguile/gc.h"
+
+#include "libguile/private-gc.h"
+
+#ifdef GUILE_DEBUG_MALLOC
+#include "libguile/debug-malloc.h"
+#endif
+
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+/*
+ INIT_MALLOC_LIMIT is the initial amount of malloc usage which will
+ trigger a GC.
+
+ After startup (at the guile> prompt), we have approximately 100k of
+ alloced memory, which won't go away on GC. Let's set the init such
+ that we get a nice yield on the next allocation:
+*/
+#define SCM_DEFAULT_INIT_MALLOC_LIMIT 200*1024
+#define SCM_DEFAULT_MALLOC_MINYIELD 40
+
+/* #define DEBUGINFO */
+
+static int scm_i_minyield_malloc;
+
+void
+scm_gc_init_malloc (void)
+{
+ scm_mtrigger = scm_getenv_int ("GUILE_INIT_MALLOC_LIMIT",
+ SCM_DEFAULT_INIT_MALLOC_LIMIT);
+ scm_i_minyield_malloc = scm_getenv_int ("GUILE_MIN_YIELD_MALLOC",
+ SCM_DEFAULT_MALLOC_MINYIELD);
+
+ if (scm_i_minyield_malloc >= 100)
+ scm_i_minyield_malloc = 99;
+ if (scm_i_minyield_malloc < 1)
+ scm_i_minyield_malloc = 1;
+
+ if (scm_mtrigger < 0)
+ scm_mtrigger = SCM_DEFAULT_INIT_MALLOC_LIMIT;
+}
+
+
+\f
+/* Function for non-cell memory management.
+ */
+
+void *
+scm_realloc (void *mem, size_t size)
+{
+ void *ptr;
+
+ SCM_SYSCALL (ptr = realloc (mem, size));
+ if (ptr)
+ return ptr;
+
+ scm_i_scm_pthread_mutex_lock (&scm_i_sweep_mutex);
+ scm_gc_running_p = 1;
+
+ scm_i_sweep_all_segments ("realloc");
+
+ SCM_SYSCALL (ptr = realloc (mem, size));
+ if (ptr)
+ {
+ scm_gc_running_p = 0;
+ scm_i_pthread_mutex_unlock (&scm_i_sweep_mutex);
+ return ptr;
+ }
+
+ scm_i_gc ("realloc");
+ scm_i_sweep_all_segments ("realloc");
+
+ scm_gc_running_p = 0;
+ scm_i_pthread_mutex_unlock (&scm_i_sweep_mutex);
+
+ SCM_SYSCALL (ptr = realloc (mem, size));
+ if (ptr)
+ return ptr;
+
+ scm_memory_error ("realloc");
+}
+
+void *
+scm_malloc (size_t sz)
+{
+ return scm_realloc (NULL, sz);
+}
+
+/*
+ Hmm. Should we use the C convention for arguments (i.e. N_ELTS,
+ SIZEOF_ELT)? --hwn
+ */
+void *
+scm_calloc (size_t sz)
+{
+ void * ptr;
+
+ /*
+ By default, try to use calloc, as it is likely more efficient than
+ calling memset by hand.
+ */
+ SCM_SYSCALL (ptr = calloc (sz, 1));
+ if (ptr)
+ return ptr;
+
+ ptr = scm_realloc (NULL, sz);
+ memset (ptr, 0x0, sz);
+ return ptr;
+}
+
+
+char *
+scm_strndup (const char *str, size_t n)
+{
+ char *dst = scm_malloc (n + 1);
+ memcpy (dst, str, n);
+ dst[n] = 0;
+ return dst;
+}
+
+char *
+scm_strdup (const char *str)
+{
+ return scm_strndup (str, strlen (str));
+}
+
+static void
+decrease_mtrigger (size_t size, const char * what)
+{
+ scm_i_pthread_mutex_lock (&scm_i_gc_admin_mutex);
+
+ if (size > scm_mallocated)
+ {
+ fprintf (stderr, "`scm_mallocated' underflow. This means that more "
+ "memory was unregistered\n"
+ "via `scm_gc_unregister_collectable_memory ()' than "
+ "registered.\n");
+ abort ();
+ }
+
+ scm_mallocated -= size;
+ scm_gc_malloc_collected += size;
+ scm_i_pthread_mutex_unlock (&scm_i_gc_admin_mutex);
+}
+
+static void
+increase_mtrigger (size_t size, const char *what)
+{
+ size_t mallocated = 0;
+ int overflow = 0, triggered = 0;
+
+ scm_i_pthread_mutex_lock (&scm_i_gc_admin_mutex);
+ if (ULONG_MAX - size < scm_mallocated)
+ overflow = 1;
+ else
+ {
+ scm_mallocated += size;
+ mallocated = scm_mallocated;
+ if (scm_mallocated > scm_mtrigger)
+ triggered = 1;
+ }
+ scm_i_pthread_mutex_unlock (&scm_i_gc_admin_mutex);
+
+ if (overflow)
+ scm_memory_error ("Overflow of scm_mallocated: too much memory in use.");
+
+ /*
+ A program that uses a lot of malloced collectable memory (vectors,
+ strings), will use a lot of memory off the cell-heap; it needs to
+ do GC more often (before cells are exhausted), otherwise swapping
+ and malloc management will tie it down.
+ */
+ if (triggered)
+ {
+ unsigned long prev_alloced;
+ float yield;
+
+ scm_i_scm_pthread_mutex_lock (&scm_i_sweep_mutex);
+ scm_gc_running_p = 1;
+
+ prev_alloced = mallocated;
+ scm_i_gc (what);
+ scm_i_sweep_all_segments ("mtrigger");
+
+ yield = (((float) prev_alloced - (float) scm_mallocated)
+ / (float) prev_alloced);
+
+ scm_gc_malloc_yield_percentage = (int) (100 * yield);
+
+#ifdef DEBUGINFO
+ fprintf (stderr, "prev %lud , now %lud, yield %4.2lf, want %d",
+ prev_alloced,
+ scm_mallocated,
+ 100.0 * yield,
+ scm_i_minyield_malloc);
+#endif
+
+ if (yield < scm_i_minyield_malloc / 100.0)
+ {
+ /*
+ We make the trigger a little larger, even; If you have a
+ program that builds up a lot of data in strings, then the
+ desired yield will never be satisfied.
+
+ Instead of getting bogged down, we let the mtrigger grow
+ strongly with it.
+ */
+ float no_overflow_trigger = scm_mallocated * 110.0;
+
+ no_overflow_trigger /= (float) (100.0 - scm_i_minyield_malloc);
+
+
+ if (no_overflow_trigger >= (float) ULONG_MAX)
+ scm_mtrigger = ULONG_MAX;
+ else
+ scm_mtrigger = (unsigned long) no_overflow_trigger;
+
+#ifdef DEBUGINFO
+ fprintf (stderr, "Mtrigger sweep: ineffective. New trigger %d\n",
+ scm_mtrigger);
+#endif
+ }
+
+ scm_gc_running_p = 0;
+ scm_i_pthread_mutex_unlock (&scm_i_sweep_mutex);
+ }
+}
+
+void
+scm_gc_register_collectable_memory (void *mem, size_t size, const char *what)
+{
+ increase_mtrigger (size, what);
+#ifdef GUILE_DEBUG_MALLOC
+ if (mem)
+ scm_malloc_register (mem, what);
+#endif
+}
+
+
+void
+scm_gc_unregister_collectable_memory (void *mem, size_t size, const char *what)
+{
+ decrease_mtrigger (size, what);
+#ifdef GUILE_DEBUG_MALLOC
+ if (mem)
+ scm_malloc_unregister (mem);
+#endif
+}
+
+void *
+scm_gc_malloc (size_t size, const char *what)
+{
+ /*
+ The straightforward implementation below has the problem
+ that it might call the GC twice, once in scm_malloc and then
+ again in scm_gc_register_collectable_memory. We don't really
+ want the second GC since it will not find new garbage.
+
+ Note: this is a theoretical peeve. In reality, malloc() never
+ returns NULL. Usually, memory is overcommitted, and when you try
+ to write it the program is killed with signal 11. --hwn
+ */
+
+ void *ptr = size ? scm_malloc (size) : NULL;
+ scm_gc_register_collectable_memory (ptr, size, what);
+ return ptr;
+}
+
+void *
+scm_gc_calloc (size_t size, const char *what)
+{
+ void *ptr = scm_gc_malloc (size, what);
+ memset (ptr, 0x0, size);
+ return ptr;
+}
+
+
+void *
+scm_gc_realloc (void *mem, size_t old_size, size_t new_size, const char *what)
+{
+ void *ptr;
+
+ /* XXX - see scm_gc_malloc. */
+
+
+ /*
+ scm_realloc() may invalidate the block pointed to by WHERE, eg. by
+ unmapping it from memory or altering the contents. Since
+ increase_mtrigger() might trigger a GC that would scan
+ MEM, it is crucial that this call precedes realloc().
+ */
+
+ decrease_mtrigger (old_size, what);
+ increase_mtrigger (new_size, what);
+
+ ptr = scm_realloc (mem, new_size);
+
+#ifdef GUILE_DEBUG_MALLOC
+ if (mem)
+ scm_malloc_reregister (mem, ptr, what);
+#endif
+
+ return ptr;
+}
+
+void
+scm_gc_free (void *mem, size_t size, const char *what)
+{
+ scm_gc_unregister_collectable_memory (mem, size, what);
+ if (mem)
+ free (mem);
+}
+
+char *
+scm_gc_strndup (const char *str, size_t n, const char *what)
+{
+ char *dst = scm_gc_malloc (n+1, what);
+ memcpy (dst, str, n);
+ dst[n] = 0;
+ return dst;
+}
+
+char *
+scm_gc_strdup (const char *str, const char *what)
+{
+ return scm_gc_strndup (str, strlen (str), what);
+}
+
+#if SCM_ENABLE_DEPRECATED == 1
+
+/* {Deprecated front end to malloc}
+ *
+ * scm_must_malloc, scm_must_realloc, scm_must_free, scm_done_malloc,
+ * scm_done_free
+ *
+ * These functions provide services comparable to malloc, realloc, and
+ * free. They should be used when allocating memory that will be under
+ * control of the garbage collector, i.e., if the memory may be freed
+ * during garbage collection.
+ *
+ * They are deprecated because they weren't really used the way
+ * outlined above, and making sure to return the right amount from
+ * smob free routines was sometimes difficult when dealing with nested
+ * data structures. We basically want everybody to review their code
+ * and use the more symmetrical scm_gc_malloc/scm_gc_free functions
+ * instead. In some cases, where scm_must_malloc has been used
+ * incorrectly (i.e. for non-GC-able memory), use scm_malloc/free.
+ */
+
+void *
+scm_must_malloc (size_t size, const char *what)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_must_malloc is deprecated. "
+ "Use scm_gc_malloc and scm_gc_free instead.");
+
+ return scm_gc_malloc (size, what);
+}
+
+void *
+scm_must_realloc (void *where,
+ size_t old_size,
+ size_t size,
+ const char *what)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_must_realloc is deprecated. "
+ "Use scm_gc_realloc and scm_gc_free instead.");
+
+ return scm_gc_realloc (where, old_size, size, what);
+}
+
+char *
+scm_must_strndup (const char *str, size_t length)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_must_strndup is deprecated. "
+ "Use scm_gc_strndup and scm_gc_free instead.");
+
+ return scm_gc_strndup (str, length, "string");
+}
+
+char *
+scm_must_strdup (const char *str)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_must_strdup is deprecated. "
+ "Use scm_gc_strdup and scm_gc_free instead.");
+
+ return scm_gc_strdup (str, "string");
+}
+
+void
+scm_must_free (void *obj)
+#define FUNC_NAME "scm_must_free"
+{
+ scm_c_issue_deprecation_warning
+ ("scm_must_free is deprecated. "
+ "Use scm_gc_malloc and scm_gc_free instead.");
+
+#ifdef GUILE_DEBUG_MALLOC
+ scm_malloc_unregister (obj);
+#endif
+ if (obj)
+ free (obj);
+ else
+ {
+ fprintf (stderr,"freeing NULL pointer");
+ abort ();
+ }
+}
+#undef FUNC_NAME
+
+
+void
+scm_done_malloc (long size)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_done_malloc is deprecated. "
+ "Use scm_gc_register_collectable_memory instead.");
+
+ if (size >= 0)
+ scm_gc_register_collectable_memory (NULL, size, "foreign mallocs");
+ else
+ scm_gc_unregister_collectable_memory (NULL, -size, "foreign mallocs");
+}
+
+void
+scm_done_free (long size)
+{
+ scm_c_issue_deprecation_warning
+ ("scm_done_free is deprecated. "
+ "Use scm_gc_unregister_collectable_memory instead.");
+
+ if (size >= 0)
+ scm_gc_unregister_collectable_memory (NULL, size, "foreign mallocs");
+ else
+ scm_gc_register_collectable_memory (NULL, -size, "foreign mallocs");
+}
+
+#endif /* SCM_ENABLE_DEPRECATED == 1 */
projects / lilypond.git / blobdiff