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Diffstat (limited to 'bin/csh/alloc.c')
| -rw-r--r-- | bin/csh/alloc.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/bin/csh/alloc.c b/bin/csh/alloc.c new file mode 100644 index 0000000..6fc8cf5 --- /dev/null +++ b/bin/csh/alloc.c @@ -0,0 +1,124 @@ +/*- + * Copyright (c) 1983, 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93"; +#endif /* not lint */ + +#include <sys/types.h> +#include <unistd.h> +#include <stdlib.h> +#if __STDC__ +# include <stdarg.h> +#else +# include <varargs.h> +#endif + +#include "csh.h" +#include "extern.h" + +char *memtop = NULL; /* PWP: top of current memory */ +char *membot = NULL; /* PWP: bottom of allocatable memory */ + +ptr_t +Malloc(n) + size_t n; +{ + ptr_t ptr; + + if (membot == NULL) + memtop = membot = sbrk(0); + if ((ptr = malloc(n)) == (ptr_t) 0) { + child++; + stderror(ERR_NOMEM); + } + return (ptr); +} + +ptr_t +Realloc(p, n) + ptr_t p; + size_t n; +{ + ptr_t ptr; + + if (membot == NULL) + memtop = membot = sbrk(0); + if ((ptr = realloc(p, n)) == (ptr_t) 0) { + child++; + stderror(ERR_NOMEM); + } + return (ptr); +} + +ptr_t +Calloc(s, n) + size_t s, n; +{ + ptr_t ptr; + + if (membot == NULL) + memtop = membot = sbrk(0); + if ((ptr = calloc(s, n)) == (ptr_t) 0) { + child++; + stderror(ERR_NOMEM); + } + + return (ptr); +} + +void +Free(p) + ptr_t p; +{ + if (p) + free(p); +} + +/* + * mstats - print out statistics about malloc + * + * Prints two lines of numbers, one showing the length of the free list + * for each size category, the second showing the number of mallocs - + * frees for each size category. + */ +void +/*ARGSUSED*/ +showall(v, t) + Char **v; + struct command *t; +{ + memtop = (char *) sbrk(0); + (void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n", + (unsigned long) membot, (unsigned long) memtop, memtop - membot); +} |
