crypto/async/arch/async_posix.c

   1 /*
   2  * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2015 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  */
  52
  53 /* This must be the first #include file */
  54 #include "../async_locl.h"
  55
  56 #ifdef ASYNC_POSIX
  57
  58 # include <stddef.h>
  59 # include <unistd.h>
  60
  61 pthread_key_t posixctx;
  62 pthread_key_t posixpool;
  63
  64 #define STACKSIZE       32768
  65
  66 int async_global_init(void)
  67 {
  68     if (pthread_key_create(&posixctx, NULL) != 0
  69             || pthread_key_create(&posixpool, NULL) != 0)
  70         return 0;
  71
  72     return 1;
  73 }
  74
  75 int async_local_init(void)
  76 {
  77     if (!async_set_ctx(NULL) || ! async_set_pool(NULL))
  78         return 0;
  79
  80     return 1;
  81 }
  82
  83 void async_local_cleanup(void)
  84 {
  85 }
  86
  87 void async_global_cleanup(void)
  88 {
  89 }
  90
  91 int async_fibre_makecontext(async_fibre *fibre)
  92 {
  93     fibre->env_init = 0;
  94     if (getcontext(&fibre->fibre) == 0) {
  95         fibre->fibre.uc_stack.ss_sp = OPENSSL_malloc(STACKSIZE);
  96         if (fibre->fibre.uc_stack.ss_sp != NULL) {
  97             fibre->fibre.uc_stack.ss_size = STACKSIZE;
  98             fibre->fibre.uc_link = NULL;
  99             makecontext(&fibre->fibre, async_start_func, 0);
 100             return 1;
 101         }
 102     } else {
 103         fibre->fibre.uc_stack.ss_sp = NULL;
 104     }
 105     return 0;
 106 }
 107
 108 void async_fibre_free(async_fibre *fibre)
 109 {
 110     OPENSSL_free(fibre->fibre.uc_stack.ss_sp);
 111     fibre->fibre.uc_stack.ss_sp = NULL;
 112 }
 113
 114 int async_pipe(OSSL_ASYNC_FD *pipefds)
 115 {
 116     if (pipe(pipefds) == 0)
 117         return 1;
 118
 119     return 0;
 120 }
 121
 122 int async_close_fd(OSSL_ASYNC_FD fd)
 123 {
 124     if (close(fd) != 0)
 125         return 0;
 126
 127     return 1;
 128 }
 129
 130 int async_write1(OSSL_ASYNC_FD fd, const void *buf)
 131 {
 132     if (write(fd, buf, 1) > 0)
 133         return 1;
 134
 135     return 0;
 136 }
 137
 138 int async_read1(OSSL_ASYNC_FD fd, void *buf)
 139 {
 140     if (read(fd, buf, 1) > 0)
 141         return 1;
 142
 143     return 0;
 144 }
 145
 146 #endif