PR_Accept 编辑

Accepts a connection on a specified socket.

Syntax

#include <prio.h>

/wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRFileDesc* PR_Accept(
  /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRFileDesc *fd,
  /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRNetAddr *addr,
  /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRIntervalTime timeout);

Parameters

The function has the following parameters:

fd

A pointer to a /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRFileDesc object representing the rendezvous socket on which the caller is willing to accept new connections.

addr

A pointer to a structure of type /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRNetAddr. On output, this structure contains the address of the connecting entity.

timeout

A value of type /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRIntervalTime specifying the time limit for completion of the accept operation.

Returns

The function returns one of the following values:

• Upon successful acceptance of a connection, a pointer to a new /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRFileDesc structure representing the newly accepted connection.
• If unsuccessful, NULL. Further information can be obtained by calling /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_GetError.

Description

The socket fd is a rendezvous socket that has been bound to an address with /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_Bind and is listening for connections after a call to /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_Listen. PR_Accept accepts the first connection from the queue of pending connections and creates a new socket for the newly accepted connection. The rendezvous socket can still be used to accept more connections.

If the addr parameter is not NULL, PR_Accept stores the address of the connecting entity in the /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PRNetAddr object pointed to by addr.

PR_Accept blocks the calling thread until either a new connection is successfully accepted or an error occurs. If the timeout parameter is not PR_INTERVAL_NO_TIMEOUT and no pending connection can be accepted before the time limit, PR_Accept returns NULL with the error code PR_IO_TIMEOUT_ERROR.