1 /* GIO - GLib Input, Output and Streaming Library 2 * 3 * Copyright (C) 2013 Collabora Ltd. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General 16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #ifndef __G_IO_PRIVATE_H__ 20 #define __G_IO_PRIVATE_H__ 21 22 #include "ginputstream.h" 23 #include "goutputstream.h" 24 #include "gsocketconnection.h" 25 #include "gsocketaddress.h" 26 27 G_BEGIN_DECLS 28 29 gboolean g_input_stream_async_read_is_via_threads (GInputStream *stream); 30 gboolean g_input_stream_async_close_is_via_threads (GInputStream *stream); 31 gboolean g_output_stream_async_write_is_via_threads (GOutputStream *stream); 32 gboolean g_output_stream_async_writev_is_via_threads (GOutputStream *stream); 33 gboolean g_output_stream_async_close_is_via_threads (GOutputStream *stream); 34 35 void g_socket_connection_set_cached_remote_address (GSocketConnection *connection, 36 GSocketAddress *address); 37 38 /* POSIX defines IOV_MAX/UIO_MAXIOV as the maximum number of iovecs that can 39 * be sent in one go. We define our own version of it here as there are two 40 * possible names, and also define a fall-back value if none of the constants 41 * are defined */ 42 #if defined(IOV_MAX) 43 #define G_IOV_MAX IOV_MAX 44 #elif defined(UIO_MAXIOV) 45 #define G_IOV_MAX UIO_MAXIOV 46 #elif defined(__APPLE__) 47 /* For macOS/iOS, UIO_MAXIOV is documented in writev(2), but <sys/uio.h> 48 * only declares it if defined(KERNEL) */ 49 #define G_IOV_MAX 512 50 #else 51 /* 16 is the minimum value required by POSIX */ 52 #define G_IOV_MAX 16 53 #endif 54 55 /* The various functions taking iovecs as parameter use a plain int 56 * for the number of vectors. Limit it to G_MAXINT for this reason. 57 */ 58 G_STATIC_ASSERT (G_IOV_MAX <= G_MAXINT); 59 60 G_END_DECLS 61 62 #endif /* __G_IO_PRIVATE__ */ 63