c521edc3a1
Some platforms claim to be POSIX but their getcontext() implementation does not work. Therefore we update the ASYNC_is_capable() function to test for this. RT#4366 Reviewed-by: Richard Levitte <levitte@openssl.org>
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/*
|
|
* Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 2015 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*/
|
|
|
|
/* This must be the first #include file */
|
|
#include "../async_locl.h"
|
|
|
|
#ifdef ASYNC_POSIX
|
|
|
|
# include <stddef.h>
|
|
# include <unistd.h>
|
|
|
|
#define STACKSIZE 32768
|
|
|
|
int ASYNC_is_capable(void)
|
|
{
|
|
ucontext_t ctx;
|
|
|
|
/*
|
|
* Some platforms provide getcontext() but it does not work (notably
|
|
* MacOSX PPC64). Check for a working getcontext();
|
|
*/
|
|
return getcontext(&ctx) == 0;
|
|
}
|
|
|
|
void async_local_cleanup(void)
|
|
{
|
|
}
|
|
|
|
int async_fibre_makecontext(async_fibre *fibre)
|
|
{
|
|
fibre->env_init = 0;
|
|
if (getcontext(&fibre->fibre) == 0) {
|
|
fibre->fibre.uc_stack.ss_sp = OPENSSL_malloc(STACKSIZE);
|
|
if (fibre->fibre.uc_stack.ss_sp != NULL) {
|
|
fibre->fibre.uc_stack.ss_size = STACKSIZE;
|
|
fibre->fibre.uc_link = NULL;
|
|
makecontext(&fibre->fibre, async_start_func, 0);
|
|
return 1;
|
|
}
|
|
} else {
|
|
fibre->fibre.uc_stack.ss_sp = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void async_fibre_free(async_fibre *fibre)
|
|
{
|
|
OPENSSL_free(fibre->fibre.uc_stack.ss_sp);
|
|
fibre->fibre.uc_stack.ss_sp = NULL;
|
|
}
|
|
|
|
#endif
|