native_client_sdk/src/libraries/nacl_io/ioctl.h

   1 /* Copyright 2013 The Chromium Authors. All rights reserved.
   2  * Use of this source code is governed by a BSD-style license that can be
   3  * found in the LICENSE file. */
   4
   5 #ifndef LIBRARIES_NACL_IO_IOCTL_H_
   6 #define LIBRARIES_NACL_IO_IOCTL_H_
   7
   8 #include <sys/types.h>
   9
  10 /*
  11  * ioctl to register an output handler with the tty node.  Will fail with
  12  * EALREADY if a handler is already registered.  Expects an argument of type
  13  * tioc_nacl_output.  The handler will be called during calls to write() on the
  14  * thread that calls write(), or, for echoed input during the
  15  * NACL_IOC_HANDLEMESSAGE ioctl() on the thread calling ioctl(). The handler
  16  * should return the number of bytes written/handled, or -errno if an error
  17  * occured.
  18  */
  19 #define TIOCNACLOUTPUT 0xadcd03
  20
  21 /*
  22  * ioctl used to set a name for a JavaScript pipe.  The name
  23  * is a string that is used to uniquely identify messages posted to and from
  24  * JavaScript which signifies that the message is destined for a
  25  * particular pipe device.  For this reason each device must have a
  26  * unique prefix.  Until a prefix is set on a given pipe any I/O operations
  27  * will return EIO.
  28  */
  29 #define NACL_IOC_PIPE_SETNAME 0xadcd04
  30
  31 /*
  32  * Find out how much space is available in a nacl_io pipe.
  33  * Argument type is "int*" which will be set to the amount of space in the
  34  * pipe in bytes.
  35  */
  36 #define NACL_IOC_PIPE_GETOSPACE 0xadcd06
  37 #define NACL_IOC_PIPE_GETISPACE 0xadcd07
  38
  39 /*
  40  * ioctl used to pass messages from JavaScript to a node.
  41  * Argument type is "struct PP_Var*".
  42  */
  43 #define NACL_IOC_HANDLEMESSAGE 0xadcd05
  44
  45 typedef char* naclioc_jspipe_name;
  46
  47 typedef ssize_t (*tioc_nacl_output_handler_t)(const char* buf,
  48                                               size_t count,
  49                                               void* user_data);
  50
  51 struct tioc_nacl_output {
  52   tioc_nacl_output_handler_t handler;
  53   void* user_data;
  54 };
  55
  56
  57 #endif  /* LIBRARIES_NACL_IO_NACL_IO_H_ */