src/libs/compat/freebsd_network/mutex.c

   1 /*
   2  * Copyright 2009, Colin Günther, coling@gmx.de.
   3  * Copyright 2007, Hugo Santos. All Rights Reserved.
   4  * Distributed under the terms of the MIT License.
   5  */
   6
   7
   8 #include "device.h"
   9
  10 #include <compat/sys/mutex.h>
  11
  12
  13 // these methods are bit unfriendly, a bit too much panic() around
  14
  15 struct mtx Giant;
  16 struct rw_lock ifnet_rwlock;
  17 struct mtx gIdStoreLock;
  18
  19
  20 void
  21 mtx_init(struct mtx *mutex, const char *name, const char *type,
  22         int options)
  23 {
  24         if ((options & MTX_RECURSE) != 0) {
  25                 recursive_lock_init_etc(&mutex->u.recursive, name,
  26                         MUTEX_FLAG_CLONE_NAME);
  27         } else {
  28                 mutex_init_etc(&mutex->u.mutex.lock, name, MUTEX_FLAG_CLONE_NAME);
  29                 mutex->u.mutex.owner = -1;
  30         }
  31
  32         mutex->type = options;
  33 }
  34
  35
  36 void
  37 mtx_destroy(struct mtx *mutex)
  38 {
  39         if ((mutex->type & MTX_RECURSE) != 0)
  40                 recursive_lock_destroy(&mutex->u.recursive);
  41         else
  42                 mutex_destroy(&mutex->u.mutex.lock);
  43 }
  44
  45
  46 status_t
  47 init_mutexes()
  48 {
  49         mtx_init(&Giant, "Banana Giant", NULL, MTX_DEF);
  50         rw_lock_init(&ifnet_rwlock, "gDevices");
  51         mtx_init(&gIdStoreLock, "Identity Store", NULL, MTX_DEF);
  52
  53         return B_OK;
  54 }
  55
  56
  57 void
  58 uninit_mutexes()
  59 {
  60         mtx_destroy(&Giant);
  61         rw_lock_destroy(&ifnet_rwlock);
  62         mtx_destroy(&gIdStoreLock);
  63 }