prio.h

Netscape NSPR库源码

 *     dynamically allocated and a pointer to it is returned.
 *     If the directory cannot be opened, a NULL pointer is returned.
 * MEMORY:
 *     Upon successful completion, the return value points to
 *     dynamically allocated memory.
 *************************************************************************
 */

NSPR_API(PRDir*) PR_OpenDir(const char *name);

/*
 *************************************************************************
 * FUNCTION: PR_ReadDir
 * DESCRIPTION:
 * INPUTS:
 *     PRDir *dir
 *         pointer to a PRDir object that designates an open directory
 *     PRDirFlags flags
 *           PR_SKIP_NONE     Do not skip any files
 *           PR_SKIP_DOT      Skip the directory entry "." that
 *                            represents the current directory
 *           PR_SKIP_DOT_DOT  Skip the directory entry ".." that
 *                            represents the parent directory.
 *           PR_SKIP_BOTH     Skip both '.' and '..'
 *           PR_SKIP_HIDDEN   Skip hidden files
 * OUTPUTS:
 * RETURN: PRDirEntry*
 *     Returns a pointer to the next entry in the directory.  Returns
 *     a NULL pointer upon reaching the end of the directory or when an
 *     error occurs. The actual reason can be retrieved via PR_GetError().
 *************************************************************************
 */

typedef enum PRDirFlags {
    PR_SKIP_NONE = 0x0,
    PR_SKIP_DOT = 0x1,
    PR_SKIP_DOT_DOT = 0x2,
    PR_SKIP_BOTH = 0x3,
    PR_SKIP_HIDDEN = 0x4
} PRDirFlags;

NSPR_API(PRDirEntry*) PR_ReadDir(PRDir *dir, PRDirFlags flags);

/*
 *************************************************************************
 * FUNCTION: PR_CloseDir
 * DESCRIPTION:
 *     Close the specified directory.
 * INPUTS:
 *     PRDir *dir
 *        The directory to be closed.
 * OUTPUTS:
 *     None
 * RETURN: PRStatus
 *        If successful, will return a status of PR_SUCCESS. Otherwise
 *        a value of PR_FAILURE. The reason for the failure may be re-
 *        trieved using PR_GetError().
 *************************************************************************
 */

NSPR_API(PRStatus) PR_CloseDir(PRDir *dir);

/*
 *************************************************************************
 * FUNCTION: PR_MkDir
 * DESCRIPTION:
 *     Create a new directory with the given name and access mode.
 * INPUTS:
 *     const char *name
 *        The name of the directory to be created. All the path components
 *        up to but not including the leaf component must already exist.
 *     PRIntn mode
 *        See 'mode' definiton in PR_Open().
 * OUTPUTS:
 *     None
 * RETURN: PRStatus
 *        If successful, will return a status of PR_SUCCESS. Otherwise
 *        a value of PR_FAILURE. The reason for the failure may be re-
 *        trieved using PR_GetError().
 *************************************************************************
 */

NSPR_API(PRStatus) PR_MkDir(const char *name, PRIntn mode);

/*
 *************************************************************************
 * FUNCTION: PR_MakeDir
 * DESCRIPTION:
 *     Create a new directory with the given name and access mode.
 *     PR_MakeDir has the same prototype as PR_MkDir but implements
 *     the specified access mode where possible.
 *************************************************************************
 */

NSPR_API(PRStatus) PR_MakeDir(const char *name, PRIntn mode);

/*
 *************************************************************************
 * FUNCTION: PR_RmDir
 * DESCRIPTION:
 *     Remove a directory by the given name.
 * INPUTS:
 *     const char *name
 *        The name of the directory to be removed. All the path components
 *        must already exist. Only the leaf component will be removed.
 * OUTPUTS:
 *     None
 * RETURN: PRStatus
 *        If successful, will return a status of PR_SUCCESS. Otherwise
 *        a value of PR_FAILURE. The reason for the failure may be re-
 *        trieved using PR_GetError().
 **************************************************************************
 */

NSPR_API(PRStatus) PR_RmDir(const char *name);

/*
 *************************************************************************
 * FUNCTION: PR_NewUDPSocket
 * DESCRIPTION:
 *     Create a new UDP socket.
 * INPUTS:
 *     None
 * OUTPUTS:
 *     None
 * RETURN: PRFileDesc*
 *     Upon successful completion, PR_NewUDPSocket returns a pointer
 *     to the PRFileDesc created for the newly opened UDP socket.
 *     Returns a NULL pointer if the creation of a new UDP socket failed.
 *
 **************************************************************************
 */

NSPR_API(PRFileDesc*)    PR_NewUDPSocket(void);

/*
 *************************************************************************
 * FUNCTION: PR_NewTCPSocket
 * DESCRIPTION:
 *     Create a new TCP socket.
 * INPUTS:
 *     None
 * OUTPUTS:
 *     None
 * RETURN: PRFileDesc*
 *     Upon successful completion, PR_NewTCPSocket returns a pointer
 *     to the PRFileDesc created for the newly opened TCP socket.
 *     Returns a NULL pointer if the creation of a new TCP socket failed.
 *
 **************************************************************************
 */

NSPR_API(PRFileDesc*)    PR_NewTCPSocket(void);

/*
 *************************************************************************
 * FUNCTION: PR_OpenUDPSocket
 * DESCRIPTION:
 *     Create a new UDP socket of the specified address family.
 * INPUTS:
 *     PRIntn af
 *       Address family
 * OUTPUTS:
 *     None
 * RETURN: PRFileDesc*
 *     Upon successful completion, PR_OpenUDPSocket returns a pointer
 *     to the PRFileDesc created for the newly opened UDP socket.
 *     Returns a NULL pointer if the creation of a new UDP socket failed.
 *
 **************************************************************************
 */

NSPR_API(PRFileDesc*)    PR_OpenUDPSocket(PRIntn af);

/*
 *************************************************************************
 * FUNCTION: PR_OpenTCPSocket
 * DESCRIPTION:
 *     Create a new TCP socket of the specified address family.
 * INPUTS:
 *     PRIntn af
 *       Address family
 * OUTPUTS:
 *     None
 * RETURN: PRFileDesc*
 *     Upon successful completion, PR_NewTCPSocket returns a pointer
 *     to the PRFileDesc created for the newly opened TCP socket.
 *     Returns a NULL pointer if the creation of a new TCP socket failed.
 *
 **************************************************************************
 */

NSPR_API(PRFileDesc*)    PR_OpenTCPSocket(PRIntn af);

/*
 *************************************************************************
 * FUNCTION: PR_Connect
 * DESCRIPTION:
 *     Initiate a connection on a socket.
 * INPUTS:
 *     PRFileDesc *fd
 *       Points to a PRFileDesc object representing a socket
 *     PRNetAddr *addr
 *       Specifies the address of the socket in its own communication
 *       space.
 *     PRIntervalTime timeout
 *       Time limit for completion of the connect operation.
 * OUTPUTS:
 *     None
 * RETURN: PRStatus
 *     Upon successful completion of connection initiation, PR_Connect
 *     returns PR_SUCCESS.  Otherwise, it returns PR_FAILURE.  Further
 *     failure information can be obtained by calling PR_GetError().
 **************************************************************************
 */

NSPR_API(PRStatus) PR_Connect(
    PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout);

/*
 *************************************************************************
 * FUNCTION: PR_ConnectContinue
 * DESCRIPTION:
 *     Continue a nonblocking connect.  After a nonblocking connect
 *     is initiated with PR_Connect() (which fails with
 *     PR_IN_PROGRESS_ERROR), one should call PR_Poll() on the socket,
 *     with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT.  When
 *     PR_Poll() returns, one calls PR_ConnectContinue() on the
 *     socket to determine whether the nonblocking connect has
 *     completed or is still in progress.  Repeat the PR_Poll(),
 *     PR_ConnectContinue() sequence until the nonblocking connect
 *     has completed.
 * INPUTS:
 *     PRFileDesc *fd
 *         the file descriptor representing a socket
 *     PRInt16 out_flags
 *         the out_flags field of the poll descriptor returned by
 *         PR_Poll()
 * RETURN: PRStatus
 *     If the nonblocking connect has successfully completed,
 *     PR_ConnectContinue returns PR_SUCCESS.  If PR_ConnectContinue()
 *     returns PR_FAILURE, call PR_GetError():
 *     - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
 *       progress and has not completed yet.  The caller should poll
 *       on the file descriptor for the in_flags
 *       PR_POLL_WRITE|PR_POLL_EXCEPT and retry PR_ConnectContinue
 *       later when PR_Poll() returns.
 *     - Other errors: the nonblocking connect has failed with this
 *       error code.
 */

NSPR_API(PRStatus)    PR_ConnectContinue(PRFileDesc *fd, PRInt16 out_flags);

/*
 *************************************************************************
 * THIS FUNCTION IS DEPRECATED.  USE PR_ConnectContinue INSTEAD.
 *
 * FUNCTION: PR_GetConnectStatus
 * DESCRIPTION:
 *     Get the completion status of a nonblocking connect.  After
 *     a nonblocking connect is initiated with PR_Connect() (which
 *     fails with PR_IN_PROGRESS_ERROR), one should call PR_Poll()
 *     on the socket, with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT.
 *     When PR_Poll() returns, one calls PR_GetConnectStatus on the
 *     PRPollDesc structure to determine whether the nonblocking
 *     connect has succeeded or failed.
 * INPUTS:
 *     const PRPollDesc *pd
 *         Pointer to a PRPollDesc whose fd member is the socket,
 *         and in_flags must contain PR_POLL_WRITE and PR_POLL_EXCEPT.
 *         PR_Poll() should have been called and set the out_flags.
 * RETURN: PRStatus
 *     If the nonblocking connect has successfully completed,
 *     PR_GetConnectStatus returns PR_SUCCESS.  If PR_GetConnectStatus()
 *     returns PR_FAILURE, call PR_GetError():
 *     - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
 *       progress and has not completed yet.
 *     - Other errors: the nonblocking connect has failed with this
 *       error code.
 */

NSPR_API(PRStatus)    PR_GetConnectStatus(const PRPollDesc *pd);

/*
 *************************************************************************
 * FUNCTION: PR_Accept
 * DESCRIPTION:
 *     Accept a connection on a socket.
 * INPUTS:
 *     PRFileDesc *fd
 *       Points to a PRFileDesc object representing the rendezvous socket
 *       on which the caller is willing to accept new connections.
 *     PRIntervalTime timeout
 *       Time limit for completion of the accept operation.
 * OUTPUTS:
 *     PRNetAddr *addr
 *       Returns the address of the connecting entity in its own
 *       communication space. It may be NULL.
 * RETURN: PRFileDesc*
 *     Upon successful acceptance of a connection, PR_Accept
 *     returns a valid file descriptor. Otherwise, it returns NULL.
 *     Further failure information can be obtained by calling PR_GetError().
 **************************************************************************
 */

NSPR_API(PRFileDesc*) PR_Accept(
    PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout);

/*
 *************************************************************************
 * FUNCTION: PR_Bind
 * DESCRIPTION:
 *    Bind an address to a socket.
 * INPUTS:
 *     PRFileDesc *fd
 *       Points to a PRFileDesc object representing a socket.
 *     PRNetAddr *addr
 *       Specifies the address to which the socket will be bound.
 * OUTPUTS:
 *     None
 * RETURN: PRStatus
 *     Upon successful binding of an address to a socket, PR_Bind
 *     returns PR_SUCCESS.  Otherwise, it returns PR_FAILURE.  Further
 *     failure information can be obtained by calling PR_GetError().
 **************************************************************************
 */

NSPR_API(PRStatus) PR_Bind(PRFileDesc *fd, const PRNetAddr *addr);

/*
 *************************************************************************
 * FUNCTION: PR_Listen
 * DESCRIPTION:
 *    Listen for connections on a socket.