probslet.h
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上传日期:2017-12-03
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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (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.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the Netscape Portable Runtime (NSPR).
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998-2000
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- ** A collection of things thought to be obsolete
- */
- #if defined(PROBSLET_H)
- #else
- #define PROBSLET_H
- #include "prio.h"
- PR_BEGIN_EXTERN_C
- /*
- ** Yield the current thread. The proper function to use in place of
- ** PR_Yield() is PR_Sleep() with an argument of PR_INTERVAL_NO_WAIT.
- */
- NSPR_API(PRStatus) PR_Yield(void);
- /************************************************************************/
- /************* The following definitions are for select *****************/
- /************************************************************************/
- /*
- ** The following is obsolete and will be deleted in the next release!
- ** These are provided for compatibility, but are GUARANTEED to be slow.
- **
- ** Override PR_MAX_SELECT_DESC if you need more space in the select set.
- */
- #ifndef PR_MAX_SELECT_DESC
- #define PR_MAX_SELECT_DESC 1024
- #endif
- typedef struct PR_fd_set {
- PRUint32 hsize;
- PRFileDesc *harray[PR_MAX_SELECT_DESC];
- PRUint32 nsize;
- PRInt32 narray[PR_MAX_SELECT_DESC];
- } PR_fd_set;
- /*
- *************************************************************************
- ** FUNCTION: PR_Select
- ** DESCRIPTION:
- **
- ** The call returns as soon as I/O is ready on one or more of the underlying
- ** file/socket descriptors or an exceptional condition is pending. A count of the
- ** number of ready descriptors is returned unless a timeout occurs in which case
- ** zero is returned. On return, PR_Select replaces the given descriptor sets with
- ** subsets consisting of those descriptors that are ready for the requested condition.
- ** The total number of ready descriptors in all the sets is the return value.
- **
- ** INPUTS:
- ** PRInt32 num
- ** This argument is unused but is provided for select(unix) interface
- ** compatability. All input PR_fd_set arguments are self-describing
- ** with its own maximum number of elements in the set.
- **
- ** PR_fd_set *readfds
- ** A set describing the io descriptors for which ready for reading
- ** condition is of interest.
- **
- ** PR_fd_set *writefds
- ** A set describing the io descriptors for which ready for writing
- ** condition is of interest.
- **
- ** PR_fd_set *exceptfds
- ** A set describing the io descriptors for which exception pending
- ** condition is of interest.
- **
- ** Any of the above readfds, writefds or exceptfds may be given as NULL
- ** pointers if no descriptors are of interest for that particular condition.
- **
- ** PRIntervalTime timeout
- ** Amount of time the call will block waiting for I/O to become ready.
- ** If this time expires without any I/O becoming ready, the result will
- ** be zero.
- **
- ** OUTPUTS:
- ** PR_fd_set *readfds
- ** A set describing the io descriptors which are ready for reading.
- **
- ** PR_fd_set *writefds
- ** A set describing the io descriptors which are ready for writing.
- **
- ** PR_fd_set *exceptfds
- ** A set describing the io descriptors which have pending exception.
- **
- ** RETURN:PRInt32
- ** Number of io descriptors with asked for conditions or zero if the function
- ** timed out or -1 on failure. The reason for the failure is obtained by
- ** calling PR_GetError().
- ** XXX can we implement this on windoze and mac?
- **************************************************************************
- */
- NSPR_API(PRInt32) PR_Select(
- PRInt32 num, PR_fd_set *readfds, PR_fd_set *writefds,
- PR_fd_set *exceptfds, PRIntervalTime timeout);
- /*
- ** The following are not thread safe for two threads operating on them at the
- ** same time.
- **
- ** The following routines are provided for manipulating io descriptor sets.
- ** PR_FD_ZERO(&fdset) initializes a descriptor set fdset to the null set.
- ** PR_FD_SET(fd, &fdset) includes a particular file descriptor fd in fdset.
- ** PR_FD_CLR(fd, &fdset) removes a file descriptor fd from fdset.
- ** PR_FD_ISSET(fd, &fdset) is nonzero if file descriptor fd is a member of
- ** fdset, zero otherwise.
- **
- ** PR_FD_NSET(osfd, &fdset) includes a particular native file descriptor osfd
- ** in fdset.
- ** PR_FD_NCLR(osfd, &fdset) removes a native file descriptor osfd from fdset.
- ** PR_FD_NISSET(osfd, &fdset) is nonzero if native file descriptor osfd is a member of
- ** fdset, zero otherwise.
- */
- NSPR_API(void) PR_FD_ZERO(PR_fd_set *set);
- NSPR_API(void) PR_FD_SET(PRFileDesc *fd, PR_fd_set *set);
- NSPR_API(void) PR_FD_CLR(PRFileDesc *fd, PR_fd_set *set);
- NSPR_API(PRInt32) PR_FD_ISSET(PRFileDesc *fd, PR_fd_set *set);
- NSPR_API(void) PR_FD_NSET(PRInt32 osfd, PR_fd_set *set);
- NSPR_API(void) PR_FD_NCLR(PRInt32 osfd, PR_fd_set *set);
- NSPR_API(PRInt32) PR_FD_NISSET(PRInt32 osfd, PR_fd_set *set);
- #ifndef NO_NSPR_10_SUPPORT
- #ifdef XP_MAC
- #include <stat.h>
- #else
- #include <sys/stat.h>
- #endif
- NSPR_API(PRInt32) PR_Stat(const char *path, struct stat *buf);
- #endif /* NO_NSPR_10_SUPPORT */
- PR_END_EXTERN_C
- #endif /* defined(PROBSLET_H) */
- /* probslet.h */