Some platforms provide getcontext() but it does not work

[openssl.git] / crypto / async / arch / async_posix.c

diff --git a/crypto/async/arch/async_posix.c b/crypto/async/arch/async_posix.c
index bb799e54f8f32bb30b0b1c9473f772c739309ee7..33f2a3fa1ea21f7f42237c589e088bca19904676 100644 (file)
--- a/crypto/async/arch/async_posix.c
+++ b/crypto/async/arch/async_posix.c
@@ -1,4 +1,3 @@
-/* crypto/async/arch/async_posix.c */
 /*
  * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
  */
@@ -51,38 +50,52 @@
  * ====================================================================
  */
 
+/* This must be the first #include file */
 #include "../async_locl.h"
-#include <openssl/async.h>
 
-#ifdef ASYNC_SYSV
-# include <stddef.h>
-# include <ucontext.h>
-# include <openssl/crypto.h>
-# include <openssl/async.h>
+#ifdef ASYNC_POSIX
 
-__thread ASYNC_CTX *sysvctx;
+# include <stddef.h>
+# include <unistd.h>
 
 #define STACKSIZE       32768
 
-int ASYNC_FIBRE_init(ASYNC_FIBRE *fibre)
+int ASYNC_is_capable(void)
 {
-    void *stack = NULL;
+    ucontext_t ctx;
 
-    if (!(stack = OPENSSL_malloc(STACKSIZE))) {
-        return 0;
-    }
+    /*
+     * Some platforms provide getcontext() but it does not work (notably
+     * MacOSX PPC64). Check for a working getcontext();
+     */
+    return getcontext(&ctx) == 0;
+}
 
-    fibre->fibre.uc_stack.ss_sp = stack;
-    fibre->fibre.uc_stack.ss_size = STACKSIZE;
-    fibre->fibre.uc_link = NULL;
-    fibre->env_init = 0;
+void async_local_cleanup(void)
+{
+}
 
-    return 1;
+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)
+void async_fibre_free(async_fibre *fibre)
 {
-    if (fibre->fibre.uc_stack.ss_sp)
-        OPENSSL_free(fibre->fibre.uc_stack.ss_sp);
+    OPENSSL_free(fibre->fibre.uc_stack.ss_sp);
+    fibre->fibre.uc_stack.ss_sp = NULL;
 }
+
 #endif