text: /*!The Treasure Box Library
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * 
   * Copyright (C) 2009-2020, TBOOX Open Source Group.
   *
   * @author      ruki
   * @file        mutex.c
   * @ingroup     platform
   */
  
  /* //////////////////////////////////////////////////////////////////////////////////////
   * includes
   */
  #include "mutex.h"
  #include "spinlock.h"
  
  /* //////////////////////////////////////////////////////////////////////////////////////
   * implementation
   */
  #ifdef TB_CONFIG_OS_WINDOWS
  #   include "windows/mutex.c"
  #elif defined(TB_CONFIG_POSIX_HAVE_PTHREAD_MUTEX_INIT)
  #   include "posix/mutex.c"
  #else
  tb_mutex_ref_t tb_mutex_init()
  {
      // done
      tb_bool_t           ok = tb_false;
      tb_spinlock_ref_t   lock = tb_null;
      do
      {
          // make lock
          lock = tb_malloc0_type(tb_spinlock_t);
          tb_assert_and_check_break(lock);
  
          // init lock
          if (!tb_spinlock_init(lock)) break;
  
          // ok
          ok = tb_true;
  
      } while (0);
  
      // failed?
      if (!ok)
      {
          // exit it
          tb_free(lock);
          lock = tb_null;
      }
  
      // ok?
      return (tb_mutex_ref_t)lock;
  }
  tb_void_t tb_mutex_exit(tb_mutex_ref_t mutex)
  {
      // check
      tb_assert_and_check_return(mutex);
  
      // exit it
      tb_spinlock_ref_t lock = (tb_spinlock_ref_t)mutex;
      if (lock)
      {
          // exit lock
          tb_spinlock_exit(lock);
  
          // free it
          tb_free(lock);
      }
  }
  tb_bool_t tb_mutex_enter(tb_mutex_ref_t mutex)
  {
      // check
      tb_assert_and_check_return_val(mutex, tb_false);
  
      // enter
      tb_spinlock_enter((tb_spinlock_ref_t)mutex);
  
      // ok
      return tb_true;
  }
  tb_bool_t tb_mutex_enter_try(tb_mutex_ref_t mutex)
  {
      // check
      tb_assert_and_check_return_val(mutex, tb_false);
  
      // try to enter
      return tb_spinlock_enter_try((tb_spinlock_ref_t)mutex);
  }
  tb_bool_t tb_mutex_leave(tb_mutex_ref_t mutex)
  {
      // check
      tb_assert_and_check_return_val(mutex, tb_false);
  
      // leave
      tb_spinlock_leave((tb_spinlock_ref_t)mutex);
  
      // ok
      return tb_true;
  }
  #endif
  