crypto/async/arch/async_posix.c

   1 /* crypto/async/arch/async_posix.c */
   2 /*
   3  * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2015 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54 #include "../async_locl.h"
  55 #include <openssl/async.h>
  56
  57 #ifdef ASYNC_POSIX
  58 # include <stddef.h>
  59 # include <ucontext.h>
  60 # include <unistd.h>
  61 # include <openssl/crypto.h>
  62 # include <openssl/async.h>
  63
  64 __thread async_ctx *sysvctx;
  65
  66 #define STACKSIZE       32768
  67
  68 extern __thread size_t posixpool_max_size;
  69 extern __thread size_t posixpool_curr_size;
  70 extern __thread STACK_OF(ASYNC_JOB) *posixpool;
  71 __thread size_t posixpool_max_size = 0;
  72 __thread size_t posixpool_curr_size = 0;
  73 __thread STACK_OF(ASYNC_JOB) *posixpool = NULL;
  74
  75 int async_fibre_init(async_fibre *fibre)
  76 {
  77     void *stack = NULL;
  78
  79     if (!(stack = OPENSSL_malloc(STACKSIZE))) {
  80         return 0;
  81     }
  82
  83     fibre->fibre.uc_stack.ss_sp = stack;
  84     fibre->fibre.uc_stack.ss_size = STACKSIZE;
  85     fibre->fibre.uc_link = NULL;
  86     fibre->env_init = 0;
  87
  88     return 1;
  89 }
  90
  91 void async_fibre_free(async_fibre *fibre)
  92 {
  93     if (fibre->fibre.uc_stack.ss_sp)
  94         OPENSSL_free(fibre->fibre.uc_stack.ss_sp);
  95 }
  96
  97 int async_pipe(int *pipefds)
  98 {
  99     if (pipe(pipefds) == 0)
 100         return 1;
 101
 102     return 0;
 103 }
 104
 105 int async_write1(int fd, const void *buf)
 106 {
 107     if (write(fd, buf, 1) > 0)
 108         return 1;
 109
 110     return 0;
 111 }
 112
 113 int async_read1(int fd, void *buf)
 114 {
 115     if (read(fd, buf, 1) > 0)
 116         return 1;
 117
 118     return 0;
 119 }
 120
 121 STACK_OF(ASYNC_JOB) *async_get_pool(void)
 122 {
 123     return posixpool;
 124 }
 125
 126 int async_set_pool(STACK_OF(ASYNC_JOB) *poolin, size_t curr_size,
 127                     size_t max_size)
 128 {
 129     posixpool = poolin;
 130     posixpool_curr_size = curr_size;
 131     posixpool_max_size = max_size;
 132     return 1;
 133 }
 134
 135 void async_increment_pool_size(void)
 136 {
 137     posixpool_curr_size++;
 138 }
 139
 140 void async_release_job_to_pool(ASYNC_JOB *job)
 141 {
 142     sk_ASYNC_JOB_push(posixpool, job);
 143 }
 144
 145 size_t async_pool_max_size(void)
 146 {
 147     return posixpool_max_size;
 148 }
 149
 150 void async_release_pool(void)
 151 {
 152     sk_ASYNC_JOB_free(posixpool);
 153     posixpool = NULL;
 154 }
 155
 156 int async_pool_can_grow(void)
 157 {
 158     return (posixpool_max_size == 0)
 159         || (posixpool_curr_size < posixpool_max_size);
 160 }
 161
 162 #endif