source: rtems/cpukit/include/rtems/posix/mqueue.h @ d8de6b9

5
Last change on this file since d8de6b9 was 2afb22b, checked in by Chris Johns <chrisj@…>, on 12/23/17 at 07:18:56

Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

  • The make preinstall step itself needs time and disk space.
  • Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error.
  • There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult.
  • The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit.
  • An introduction of a new build system is difficult.
  • Include paths specified by the -B option are system headers. This may suppress warnings.
  • The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

  • cpukit/include
  • cpukit/score/cpu/@RTEMS_CPU@/include
  • cpukit/libnetworking

The new BSP include directories are:

  • bsps/include
  • bsps/@RTEMS_CPU@/include
  • bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.

The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.

Update #3254.
  • Property mode set to 100644
File size: 1.7 KB
Line 
1/**
2 * @file
3 *
4 * @brief POSIX Message Queues Private Private Support
5 *
6 * This include file contains all the private support information for
7 * POSIX Message Queues.
8 *
9 * The structure of the routines is identical to that of POSIX
10 * Message_queues to leave the option of having unnamed message
11 * queues at a future date.  They are currently not part of the
12 * POSIX standard but unnamed message_queues are.  This is also
13 * the reason for the apparently unnecessary tracking of
14 * the process_shared attribute.  [In addition to the fact that
15 * it would be trivial to add pshared to the mq_attr structure
16 * and have process private message queues.]
17 *
18 * This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open
19 * time.
20 */
21
22/*
23 *  COPYRIGHT (c) 1989-2011.
24 *  On-Line Applications Research Corporation (OAR).
25 *
26 *  The license and distribution terms for this file may be
27 *  found in the file LICENSE in this distribution or at
28 *  http://www.rtems.org/license/LICENSE.
29 */
30
31#ifndef _RTEMS_POSIX_MQUEUE_H
32#define _RTEMS_POSIX_MQUEUE_H
33
34#include <signal.h>
35#include <mqueue.h> /* struct mq_attr */
36#include <rtems/score/coremsg.h>
37#include <rtems/score/object.h>
38
39#ifdef __cplusplus
40extern "C" {
41#endif
42
43/**
44 *  @defgroup POSIX_MQUEUE_P Message Queues Private Support
45 *
46 *  @ingroup POSIXAPI
47 *
48 */
49/**@{**/
50
51/*
52 *  Data Structure used to manage a POSIX message queue
53 */
54
55typedef struct {
56   Objects_Control             Object;
57   CORE_message_queue_Control  Message_queue;
58   bool                        linked;
59   uint32_t                    open_count;
60   struct sigevent             notification;
61   int                         oflag;
62}  POSIX_Message_queue_Control;
63
64/** @} */
65
66#ifdef __cplusplus
67}
68#endif
69
70#endif
71/*  end of include file */
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