import newlib-2000-02-17 snapshot

1 files changed, 151 insertions, 0 deletions

diff --git a/newlib/libc/stdlib/mstats.c b/newlib/libc/stdlib/mstats.c
new file mode 100644
index 000000000..c1628957a
--- /dev/null
+++ b/newlib/libc/stdlib/mstats.c
@@ -0,0 +1,151 @@
+/* VxWorks provides its own version of malloc, and we can't use this
+   one because VxWorks does not provide sbrk.  So we have a hook to
+   not compile this code.  */
+
+#ifdef MALLOC_PROVIDED
+
+int _dummy_mstats = 1;
+
+#else
+
+/*
+FUNCTION
+<<mallinfo>>, <<malloc_stats>>, <<mallopt>>--malloc support
+
+INDEX
+	mallinfo
+INDEX
+	malloc_stats
+INDEX
+	mallopt
+INDEX
+	_mallinfo_r
+INDEX
+	_malloc_stats_r
+INDEX
+	_mallopt_r
+
+ANSI_SYNOPSIS
+	#include <malloc.h>
+	struct mallinfo mallinfo(void);
+	void malloc_stats(void);
+	int mallopt(int <[parameter]>, <[value]>);
+
+	struct mallinfo _mallinfo_r(void *<[reent]>);
+	void _malloc_stats_r(void *<[reent]>);
+	int _mallopt_r(void *<[reent]>, int <[parameter]>, <[value]>);
+
+TRAD_SYNOPSIS
+	#include <malloc.h>
+	struct mallinfo mallinfo();
+
+	void malloc_stats();
+
+	int mallopt(<[parameter]>, <[value]>)
+	int <[parameter]>;
+	int <[value]>;
+
+	struct mallinfo _mallinfo_r(<[reent]>);
+	char *<[reent]>;
+
+	void _malloc_stats_r(<[reent]>);
+	char *<[reent]>;
+
+	int _mallopt_r(<[reent]>, <[parameter]>, <[value]>)
+	char *<[reent]>;
+	int <[parameter]>;
+	int <[value]>;
+
+DESCRIPTION
+<<mallinfo>> returns a structure describing the current state of
+memory allocation.  The structure is defined in malloc.h.  The
+following fields are defined: <<arena>> is the total amount of space
+in the heap; <<ordblks>> is the number of chunks which are not in use;
+<<uordblks>> is the total amount of space allocated by <<malloc>>;
+<<fordblks>> is the total amount of space not in use; <<keepcost>> is
+the size of the top most memory block.
+
+<<malloc_stats>> print some statistics about memory allocation on
+standard error.
+
+<<mallopt>> takes a parameter and a value.  The parameters are defined
+in malloc.h, and may be one of the following: <<M_TRIM_THRESHOLD>>
+sets the maximum amount of unused space in the top most block before
+releasing it back to the system in <<free>> (the space is released by
+calling <<_sbrk_r>> with a negative argument); <<M_TOP_PAD>> is the
+amount of padding to allocate whenever <<_sbrk_r>> is called to
+allocate more space.
+
+The alternate functions <<_mallinfo_r>>, <<_malloc_stats_r>>, and
+<<_mallopt_r>> are reentrant versions.  The extra argument <[reent]>
+is a pointer to a reentrancy structure.
+
+RETURNS
+<<mallinfo>> returns a mallinfo structure.  The structure is defined
+in malloc.h.
+
+<<malloc_stats>> does not return a result.
+
+<<mallopt>> returns zero if the parameter could not be set, or
+non-zero if it could be set.
+
+PORTABILITY
+<<mallinfo>> and <<mallopt>> are provided by SVR4, but <<mallopt>>
+takes different parameters on different systems.  <<malloc_stats>> is
+not portable.
+
+*/
+
+#include <_ansi.h>
+#include <reent.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <stdio.h>
+
+#ifndef _REENT_ONLY
+
+struct mallinfo
+_DEFUN_VOID (mallinfo)
+{
+  return _mallinfo_r (_REENT);
+}
+
+void
+_DEFUN_VOID (malloc_stats)
+{
+  _malloc_stats_r (_REENT);
+}
+
+int
+_DEFUN (mallopt, (p, v),
+	int p _AND
+	int v)
+{
+  return _mallopt_r (_REENT, p, v);
+}
+
+#endif
+
+/* mstats is now compatibility code.  It used to be real, for a
+   previous version of the malloc routines.  It now just calls
+   malloc_stats.  */
+
+void
+_DEFUN (_mstats_r, (ptr, s),
+	struct _reent *ptr _AND
+	char *s)
+{
+  fiprintf (_stderr_r (ptr), "Memory allocation statistics %s\n", s);
+  _malloc_stats_r (ptr);
+}
+
+#ifndef _REENT_ONLY
+void
+_DEFUN (mstats, (s),
+	char *s)
+{
+  _mstats_r (_REENT, s);
+}
+
+#endif
+#endif /* ! defined (MALLOC_PROVIDED) */