crypto/async/arch/async_win.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_WIN
  57
  58 # include <windows.h>
  59 # include "internal/cryptlib.h"
  60
  61 struct winpool {
  62     STACK_OF(ASYNC_JOB) *pool;
  63     size_t curr_size;
  64     size_t max_size;
  65 };
  66
  67 static DWORD asyncwinpool = 0;
  68 static DWORD asyncwinctx = 0;
  69
  70
  71 void async_start_func(void);
  72
  73 int async_global_init(void)
  74 {
  75     asyncwinpool = TlsAlloc();
  76     asyncwinctx = TlsAlloc();
  77     if (asyncwinpool == TLS_OUT_OF_INDEXES
  78             || asyncwinctx == TLS_OUT_OF_INDEXES) {
  79         if (asyncwinpool != TLS_OUT_OF_INDEXES) {
  80             TlsFree(asyncwinpool);
  81         }
  82         if (asyncwinctx != TLS_OUT_OF_INDEXES) {
  83             TlsFree(asyncwinctx);
  84         }
  85         return 0;
  86     }
  87     return 1;
  88 }
  89
  90 void async_local_cleanup(void)
  91 {
  92     async_ctx *ctx = async_arch_get_ctx();
  93     if (ctx != NULL) {
  94         async_fibre *fibre = &ctx->dispatcher;
  95         if(fibre != NULL && fibre->fibre != NULL && fibre->converted) {
  96             ConvertFiberToThread();
  97             fibre->fibre = NULL;
  98         }
  99     }
 100 }
 101
 102 void async_global_cleanup(void)
 103 {
 104     TlsFree(asyncwinpool);
 105     TlsFree(asyncwinctx);
 106     asyncwinpool = 0;
 107     asyncwinctx = 0;
 108 }
 109
 110 int async_fibre_init_dispatcher(async_fibre *fibre)
 111 {
 112     fibre->fibre = ConvertThreadToFiber(NULL);
 113     if (fibre->fibre == NULL) {
 114         fibre->converted = 0;
 115         fibre->fibre = GetCurrentFiber();
 116         if (fibre->fibre == NULL)
 117             return 0;
 118     } else {
 119         fibre->converted = 1;
 120     }
 121
 122     return 1;
 123 }
 124
 125 VOID CALLBACK async_start_func_win(PVOID unused)
 126 {
 127     async_start_func();
 128 }
 129
 130 async_pool *async_get_pool(void)
 131 {
 132     return (async_pool *)TlsGetValue(asyncwinpool);
 133 }
 134
 135
 136 int async_set_pool(async_pool *pool)
 137 {
 138     return TlsSetValue(asyncwinpool, (LPVOID)pool) != 0;
 139 }
 140
 141 async_ctx *async_arch_get_ctx(void)
 142 {
 143     return (async_ctx *)TlsGetValue(asyncwinctx);
 144 }
 145
 146 int async_set_ctx(async_ctx *ctx)
 147 {
 148     return TlsSetValue(asyncwinctx, (LPVOID)ctx) != 0;
 149 }
 150
 151 #endif