add an additional async notification communication method based on callback

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Yang <yang.yang@baishancloud.com>
Signed-off-by: Ping Yu <ping.yu@intel.com>
Signed-off-by: Steven Linsell <stevenx.linsell@intel.com>

(Merged from https://github.com/openssl/openssl/pull/7573)

1 files changed, 14 insertions, 0 deletions

diff --git a/include/openssl/async.h b/include/openssl/async.h
index 71aef3bf98..910c144c6b 100644
--- a/include/openssl/async.h
+++ b/include/openssl/async.h
@@ -31,12 +31,18 @@ extern "C" {
 
 typedef struct async_job_st ASYNC_JOB;
 typedef struct async_wait_ctx_st ASYNC_WAIT_CTX;
+typedef int (*ASYNC_callback_fn)(void *arg);
 
 #define ASYNC_ERR      0
 #define ASYNC_NO_JOBS  1
 #define ASYNC_PAUSE    2
 #define ASYNC_FINISH   3
 
+#define ASYNC_STATUS_UNSUPPORTED    0
+#define ASYNC_STATUS_ERR            1
+#define ASYNC_STATUS_OK             2
+#define ASYNC_STATUS_EAGAIN         3
+
 int ASYNC_init_thread(size_t max_size, size_t init_size);
 void ASYNC_cleanup_thread(void);
 
@@ -52,6 +58,14 @@ int ASYNC_WAIT_CTX_get_fd(ASYNC_WAIT_CTX *ctx, const void *key,
                         OSSL_ASYNC_FD *fd, void **custom_data);
 int ASYNC_WAIT_CTX_get_all_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *fd,
                                size_t *numfds);
+int ASYNC_WAIT_CTX_get_callback(ASYNC_WAIT_CTX *ctx,
+                                ASYNC_callback_fn *callback,
+                                void **callback_arg);
+int ASYNC_WAIT_CTX_set_callback(ASYNC_WAIT_CTX *ctx,
+                                ASYNC_callback_fn callback,
+                                void *callback_arg);
+int ASYNC_WAIT_CTX_set_status(ASYNC_WAIT_CTX *ctx, int status);
+int ASYNC_WAIT_CTX_get_status(ASYNC_WAIT_CTX *ctx);
 int ASYNC_WAIT_CTX_get_changed_fds(ASYNC_WAIT_CTX *ctx, OSSL_ASYNC_FD *addfd,
                                    size_t *numaddfds, OSSL_ASYNC_FD *delfd,
                                    size_t *numdelfds);