ithread.h

电驴下载工具eMule0.47aVeryCD的源代码,可作分析测试也可用于P2P软件的开发研究.

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// Copyright (c) 2000-2003 Intel Corporation 
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#ifndef ITHREADH
#define ITHREADH
#ifdef __cplusplus
extern "C" {
#endif

#ifndef DEBUG_ONLY
#ifdef _DEBUG
#define DEBUG_ONLY(x) x
#else
#define DEBUG_ONLY(x)
#endif
#endif
#include "pthread.h"
#ifndef _WIN32
#include <unistd.h>
#endif

#define ITHREAD_MUTEX_FAST_NP PTHREAD_MUTEX_FAST_NP
#define ITHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE_NP
#define ITHREAD_MUTEX_ERRORCHECK_NP PTHREAD_MUTEX_ERRORCHECK_NP
#define ITHREAD_CANCELED PTHREAD_CANCELED
  
  
  /***************************************************************************
   * Name: ithread_t
   *
   *  Description:
   *      Thread handle.
   *      typedef to pthread_t.
   *      Internal Use Only.
   ***************************************************************************/
  typedef pthread_t ithread_t; 
  
  /****************************************************************************
   * Name: ithread_attr_t
   *
   *  Description:
   *      Thread attribute.
   *      typedef to pthread_attr_t
   *      Internal Use Only
   ***************************************************************************/
  typedef pthread_attr_t ithread_attr_t;	


  /****************************************************************************
   * Name: start_routine
   *
   *  Description:
   *      Thread start routine 
   *      Internal Use Only.
   ***************************************************************************/
  typedef void * (*start_routine) (void *arg);

  
  /****************************************************************************
   * Name: ithread_cond_t
   *
   *  Description:
   *      condition variable.
   *      typedef to pthread_cond_t
   *      Internal Use Only.
   ***************************************************************************/
  typedef pthread_cond_t ithread_cond_t;


  /****************************************************************************
   * Name: ithread_mutexattr_t
   *
   *  Description:
   *      Mutex attribute.
   *      typedef to pthread_mutexattr_t
   *      Internal Use Only
   ***************************************************************************/
  typedef pthread_mutexattr_t ithread_mutexattr_t;	


  /****************************************************************************
   * Name: ithread_mutex_t
   *
   *  Description:
   *      Mutex.
   *      typedef to pthread_mutex_t
   *      Internal Use Only.
   ***************************************************************************/
  typedef pthread_mutex_t ithread_mutex_t;


  /****************************************************************************
   * Name: ithread_condattr_t
   *
   *  Description:
   *      Condition attribute.
   *      typedef to pthread_condattr_t
   *      NOT USED
   *      Internal Use Only
   ***************************************************************************/
  typedef pthread_condattr_t ithread_condattr_t;	

  /****************************************************************************
   * Function: ithread_mutexattr_init
   *
   *  Description:
   *      Initializes a mutex attribute variable.
   *      Used to set the type of the mutex.
   *  Parameters:
   *      ithread_mutexattr_init * attr (must be valid non NULL pointer to 
   *                                     pthread_mutexattr_t)
   *  Returns:
   *      0 on success, Nonzero on failure.
   *      Always returns 0.
   *      See man page for pthread_mutexattr_init
   ***************************************************************************/
  
#define ithread_mutexattr_init pthread_mutexattr_init
  
  /****************************************************************************
   * Function: ithread_mutexattr_destroy
   *
   *  Description:
   *      Releases any resources held by the mutex attribute.
   *      Currently there are no resources associated with the attribute
   *  Parameters:
   *      ithread_mutexattr_t * attr (must be valid non NULL pointer to 
   *                                  pthread_mutexattr_t)
   *  Returns:
   *      0 on success, Nonzero on failure.
   *      Always returns 0.
   *      See man page for pthread_mutexattr_destroy
   ***************************************************************************/
#define ithread_mutexattr_destroy pthread_mutexattr_destroy
  
  
/****************************************************************************
 * Function: ithread_mutexattr_setkind_np
 *
 *  Description:
 *      Sets the mutex type in the attribute.
 *      Valid types are: ITHREAD_MUTEX_FAST_NP 
 *                       ITHREAD_MUTEX_RECURSIVE_NP 
 *                       ITHREAD_MUTEX_ERRORCHECK_NP
 *
 *  Parameters:
 *      ithread_mutexattr_t * mutex (must be valid non NULL pointer to 
 *                                   ithread_mutexattr_t)
 *      int kind (one of ITHREAD_MUTEX_FAST_NP or ITHREAD_MUTEX_RECURSIVE_NP
 *                or ITHREAD_MUTEX_ERRORCHECK_NP)
 *  Returns:
 *      0 on success. Nonzero on failure.
 *      Returns EINVAL if the kind is not supported.
 *      See man page for pthread_mutexattr_setkind_np
 *****************************************************************************/
#define ithread_mutexattr_setkind_np pthread_mutexattr_setkind_np


/****************************************************************************
 * Function: ithread_mutexattr_getkind_np
 *
 *  Description:
 *      Gets the mutex type in the attribute.
 *      Valid types are: ITHREAD_MUTEX_FAST_NP 
 *                       ITHREAD_MUTEX_RECURSIVE_NP 
 *                       ITHREAD_MUTEX_ERRORCHECK_NP
 *
 *  Parameters:
 *      ithread_mutexattr_t * mutex (must be valid non NULL pointer to 
 *                                   pthread_mutexattr_t)
 *      int *kind (one of ITHREAD_MUTEX_FAST_NP or ITHREAD_MUTEX_RECURSIVE_NP
 *                or ITHREAD_MUTEX_ERRORCHECK_NP)
 *  Returns:
 *      0 on success. Nonzero on failure.
 *      Always returns 0.
 *      See man page for pthread_mutexattr_getkind_np
 *****************************************************************************/
#define ithread_mutexattr_getkind_np pthread_mutexattr_getkind_np

  
/****************************************************************************
 * Function: ithread_mutex_init
 *
 *  Description:
 *      Initializes mutex.
 *      Must be called before use.
 *      
 *  Parameters:
 *      ithread_mutex_t * mutex (must be valid non NULL pointer to pthread_mutex_t)
 *      const ithread_mutexattr_t * mutex_attr 
 *  Returns:
 *      0 on success, Nonzero on failure.
 *      Always returns 0.
 *      See man page for pthread_mutex_init
 *****************************************************************************/
#define ithread_mutex_init pthread_mutex_init
  
/****************************************************************************
 * Function: ithread_mutex_lock
 *
 *  Description:
 *      Locks mutex.
 *  Parameters:
 *      ithread_mutex_t * mutex (must be valid non NULL pointer to pthread_mutex_t)
 *      mutex must be initialized.
 *      
 *  Returns:
 *      0 on success, Nonzero on failure.
 *      Always returns 0.
 *      See man page for pthread_mutex_lock
 *****************************************************************************/
#define ithread_mutex_lock pthread_mutex_lock
  

// make mutex_trylock externally visible
 /* Function: ithread_mutex_trylock
 *
 *  Description:
 *      Locks mutex.
 *  Parameters:
 *      ithread_mutex_t * mutex (must be valid non NULL pointer to pthread_mutex_t)
 *      mutex must be initialized.
 *      
 *  Returns:
 *      0 on success
 *      EBUSY without blocking if the thread is locked
 *      See man page for pthread_mutex_trylock
 *****************************************************************************/
#define ithread_mutex_trylock pthread_mutex_trylock
  

/****************************************************************************
 * Function: ithread_mutex_unlock
 *
 *  Description:
 *      Unlocks mutex.
 *
 *  Parameters:
 *      ithread_mutex_t * mutex (must be valid non NULL pointer to pthread_mutex_t)
 *      mutex must be initialized.
 *      
 *  Returns:
 *      0 on success, Nonzero on failure.
 *      Always returns 0.
 *      See man page for pthread_mutex_unlock
 *****************************************************************************/
#define ithread_mutex_unlock pthread_mutex_unlock


/****************************************************************************
 * Function: ithread_mutex_destroy
 *
 *  Description:
 *      Releases any resources held by the mutex. 
 *		Mutex can no longer be used after this call.