96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
#if defined(ESP32)
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#ifndef __LIBSSH2_SESSION_H
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#define __LIBSSH2_SESSION_H
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/* Copyright (c) 2004-2007 Sara Golemon <sarag@libssh2.org>
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* Copyright (c) 2009-2010 by Daniel Stenberg
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* Copyright (c) 2010 Simon Josefsson <simon@josefsson.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* Neither the name of the copyright holder nor the names
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* of any other contributors may be used to endorse or
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* promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*/
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/* Conveniance-macros to allow code like this;
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int rc = BLOCK_ADJUST(rc, session, session_startup(session, sock) );
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int rc = BLOCK_ADJUST_ERRNO(ptr, session, session_startup(session, sock) );
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The point of course being to make sure that while in non-blocking mode
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these always return no matter what the return code is, but in blocking mode
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it blocks if EAGAIN is the reason for the return from the underlying
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function.
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*/
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#define BLOCK_ADJUST(rc, sess, x) \
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do { \
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time_t entry_time = time(NULL); \
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do { \
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rc = x; \
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/* the order of the check below is important to properly deal with \
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the case when the 'sess' is freed */ \
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if((rc != LIBSSH2_ERROR_EAGAIN) || !sess->api_block_mode) \
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break; \
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rc = _libssh2_wait_socket(sess, entry_time); \
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} while(!rc); \
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} while(0)
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/*
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* For functions that returns a pointer, we need to check if the API is
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* non-blocking and return immediately. If the pointer is non-NULL we return
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* immediately. If the API is blocking and we get a NULL we check the errno
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* and *only* if that is EAGAIN we loop and wait for socket action.
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*/
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#define BLOCK_ADJUST_ERRNO(ptr, sess, x) \
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do { \
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time_t entry_time = time(NULL); \
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int rc; \
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do { \
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ptr = x; \
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if(!sess->api_block_mode || \
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(ptr != NULL) || \
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(libssh2_session_last_errno(sess) != LIBSSH2_ERROR_EAGAIN) ) \
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break; \
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rc = _libssh2_wait_socket(sess, entry_time); \
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} while(!rc); \
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} while(0)
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int _libssh2_wait_socket(LIBSSH2_SESSION *session, time_t entry_time);
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/* this is the lib-internal set blocking function */
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int _libssh2_session_set_blocking(LIBSSH2_SESSION * session, int blocking);
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#endif /* __LIBSSH2_SESSION_H */
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#endif
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