[PATCH 4/4] ntdll: Add helpers to send / receive fds with a request.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/ntdll/unix/server.c | 45 ++++++++++++++++++++++++++++++++++++++++
 include/wine/server.h    |  2 ++
 2 files changed, 47 insertions(+)

diff --git a/dlls/ntdll/unix/server.c b/dlls/ntdll/unix/server.c
index e8da94ebc64..56c2bad40ed 100644
--- a/dlls/ntdll/unix/server.c
+++ b/dlls/ntdll/unix/server.c
@@ -1495,6 +1495,51 @@ static void send_server_task_port(void)
 #endif  /* __APPLE__ */

+/***********************************************************************
+ *           wine_server_call_send_unix_fd
+ *
+ * Send an fd and perform a server call.
+ */
+unsigned int CDECL wine_server_call_send_fd( void *req_ptr, enum fd_type type, int fd )
+{
+    switch (type)
+    {
+    case FD_TYPE_NONE: break;
+    case FD_TYPE_UNIX: wine_server_send_fd( fd ); break;
+    default: assert( 0 ); break;
+    }
+    return wine_server_call( req_ptr );
+}
+
+
+/***********************************************************************
+ *           wine_server_call_receive_fd
+ *
+ * Perform a server call and receive an fd.
+ */
+unsigned int CDECL wine_server_call_receive_fd( void *req_ptr, enum fd_type *type, int *fd, obj_handle_t *handle )
+{
+    struct __server_request_info * const req = req_ptr;
+    unsigned int ret;
+    sigset_t sigset;
+
+    server_enter_uninterrupted_section( &fd_cache_mutex, &sigset );
+
+    if ((ret = server_call_unlocked( req_ptr ))) *handle = *fd = -1;
+    else switch ((*type = req->u.reply.reply_header.fd_type))
+    {
+    case FD_TYPE_NONE: *fd = *handle = 0; break;
+    case FD_TYPE_UNIX: *fd = wine_server_receive_fd( handle ); break;
+    default: assert( 0 ); break;
+    }
+
+    server_leave_uninterrupted_section( &fd_cache_mutex, &sigset );
+
+    if (!ret && *fd == -1) ret = STATUS_TOO_MANY_OPENED_FILES;
+    return ret;
+}
+
+
 /***********************************************************************
  *           get_unix_tid
  *
diff --git a/include/wine/server.h b/include/wine/server.h
index 458c33c27b5..5e4c58f252f 100644
--- a/include/wine/server.h
+++ b/include/wine/server.h
@@ -50,6 +50,8 @@ struct __server_request_info
 };

NTSYSAPI unsigned int CDECL wine_server_call( void *req_ptr );
+NTSYSAPI unsigned int CDECL wine_server_call_send_fd( void *req_ptr, enum fd_type type, int fd );
+NTSYSAPI unsigned int CDECL wine_server_call_receive_fd( void *req_ptr, enum fd_type *type, int *fd, obj_handle_t *handle );
 NTSYSAPI NTSTATUS CDECL wine_server_fd_to_handle( int fd, unsigned int access, unsigned int attributes, HANDLE *handle );
 NTSYSAPI NTSTATUS CDECL wine_server_handle_to_fd( HANDLE handle, unsigned int access, int *unix_fd, unsigned int *options );