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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdlib/] [mstats.c] - Rev 283
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/* 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); } #if !defined (_ELIX_LEVEL) || _ELIX_LEVEL >= 2 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 /* !_ELIX_LEVEL || _ELIX_LEVEL >= 2 */ #endif #if !defined (_ELIX_LEVEL) || _ELIX_LEVEL >= 2 /* 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) { _REENT_SMALL_CHECK_INIT(ptr); 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 /* !_ELIX_LEVEL || _ELIX_LEVEL >= 2 */ #endif /* ! defined (MALLOC_PROVIDED) */
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