1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1994, by Sun Microsytems, Inc. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * Includes 30 */ 31 32 #include "prb_internals.h" 33 34 35 /* 36 * Globals 37 * Memory that prex uses to store combinations in target process 38 */ 39 40 #define INITMEMSZ 2048 41 42 static char initial_memory[INITMEMSZ]; 43 static tnf_memseg_t initial_memseg = { 44 initial_memory, 45 initial_memory + INITMEMSZ, 46 DEFAULTMUTEX, 47 0 48 }; 49 50 tnf_memseg_t * __tnf_probe_memseg_p = &initial_memseg; 51 52 53 /* 54 * __tnf_probe_alloc() - allocates memory from the global pool 55 */ 56 57 char * 58 __tnf_probe_alloc(size_t size) 59 { 60 tnf_memseg_t * memseg_p = __tnf_probe_memseg_p; 61 char * ptr; 62 63 ptr = NULL; 64 65 mutex_lock(&memseg_p->i_lock); 66 67 memseg_p->i_reqsz = size; 68 69 if ((memseg_p->min_p + size) <= memseg_p->max_p) { 70 ptr = memseg_p->min_p; 71 memseg_p->min_p += size; 72 } 73 74 memseg_p->i_reqsz = 0; 75 76 mutex_unlock(&memseg_p->i_lock); 77 78 return (ptr); 79 80 } /* end __tnf_probe_alloc */ 81