1 files changed, 57 insertions, 0 deletions
diff --git a/crypto/async/arch/async_posix.h b/crypto/async/arch/async_posix.h
new file mode 100644
index 000000000000..b07c2cb01beb
--- /dev/null
+++ b/crypto/async/arch/async_posix.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#ifndef OPENSSL_ASYNC_ARCH_ASYNC_POSIX_H
+#define OPENSSL_ASYNC_ARCH_ASYNC_POSIX_H
+#include <openssl/e_os2.h>
+
+#if defined(OPENSSL_SYS_UNIX) \
+    && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC) \
+    && !defined(__ANDROID__) && !defined(__OpenBSD__)
+
+# include <unistd.h>
+
+# if _POSIX_VERSION >= 200112L
+
+# include <pthread.h>
+
+#  define ASYNC_POSIX
+#  define ASYNC_ARCH
+
+#  include <ucontext.h>
+#  include <setjmp.h>
+
+typedef struct async_fibre_st {
+    ucontext_t fibre;
+    jmp_buf env;
+    int env_init;
+} async_fibre;
+
+static ossl_inline int async_fibre_swapcontext(async_fibre *o, async_fibre *n, int r)
+{
+    o->env_init = 1;
+
+    if (!r || !_setjmp(o->env)) {
+        if (n->env_init)
+            _longjmp(n->env, 1);
+        else
+            setcontext(&n->fibre);
+    }
+
+    return 1;
+}
+
+#  define async_fibre_init_dispatcher(d)
+
+int async_fibre_makecontext(async_fibre *fibre);
+void async_fibre_free(async_fibre *fibre);
+
+# endif
+#endif
+#endif /* OPENSSL_ASYNC_ARCH_ASYNC_POSIX_H */