usr/src/cmd/fm/fmd/common/fmd_alloc.c

   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 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <stdlib.h>
  30 #include <strings.h>
  31 #include <umem.h>
  32 #include <poll.h>
  33 #include <errno.h>
  34
  35 #include <fmd_alloc.h>
  36 #include <fmd_subr.h>
  37 #include <fmd_module.h>
  38 #include <fmd_scheme.h>
  39 #include <fmd.h>
  40
  41 void *
  42 fmd_alloc(size_t size, int flags)
  43 {
  44         void *data = umem_alloc(size, UMEM_DEFAULT);
  45         uint_t try, lim, msecs;
  46
  47         if (data != NULL || size == 0 || !(flags & FMD_SLEEP))
  48                 return (data); /* in common cases just return result */
  49
  50         lim = fmd.d_alloc_tries;
  51         msecs = fmd.d_alloc_msecs;
  52
  53         for (try = 0; data == NULL && try < lim; try++) {
  54                 (void) poll(NULL, 0, msecs);
  55                 msecs *= 10;
  56                 data = umem_alloc(size, UMEM_DEFAULT);
  57         }
  58
  59         if (data == NULL) {
  60                 fmd_modhash_tryapply(fmd.d_mod_hash, fmd_module_trygc);
  61                 fmd_scheme_hash_trygc(fmd.d_schemes);
  62                 data = umem_alloc(size, UMEM_DEFAULT);
  63         }
  64
  65         if (data == NULL)
  66                 fmd_panic("insufficient memory (%u bytes needed)\n", size);
  67
  68         return (data);
  69 }
  70
  71 void *
  72 fmd_zalloc(size_t size, int flags)
  73 {
  74         void *data = fmd_alloc(size, flags);
  75
  76         if (data != NULL)
  77                 bzero(data, size);
  78
  79         return (data);
  80 }
  81
  82 void
  83 fmd_free(void *data, size_t size)
  84 {
  85         umem_free(data, size);
  86 }