source: rtems/cpukit/include/rtems/posix/mmanimpl.h @ 21275b58

5
Last change on this file since 21275b58 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: 1.2 KB
Line 
1/**
2 * @file
3 *
4 * @brief Internal Support for POSIX 1003.1b 6.3.1 - map pages of memory
5 *
6 */
7
8/*
9 * Copyright (c) 2012 Chris Johns
10 *
11 * The license and distribution terms for this file may be
12 * found in the file LICENSE in this distribution or at
13 * http://www.rtems.org/license/LICENSE.
14 */
15
16#ifndef _RTEMS_POSIX_MMANIMPL_H
17#define _RTEMS_POSIX_MMANIMPL_H
18
19#include <rtems/libio_.h>
20#include <rtems/chain.h> /* FIXME: use score chains for proper layering? */
21#include <rtems/posix/shm.h>
22
23#ifdef __cplusplus
24extern "C" {
25#endif
26
27/* FIXME: add Doxygen */
28
29/**
30 * Every mmap'ed region has a mapping.
31 */
32typedef struct mmap_mappings_s {
33  rtems_chain_node   node;  /**< The mapping chain's node */
34  void*              addr;  /**< The address of the mapped memory */
35  size_t             len;   /**< The length of memory mapped */
36  int                flags; /**< The mapping flags */
37  POSIX_Shm_Control *shm;   /**< The shared memory object or NULL */
38} mmap_mapping;
39
40extern rtems_chain_control mmap_mappings;
41
42static inline void mmap_mappings_lock_obtain( void )
43{
44  rtems_libio_lock();
45}
46
47static inline void mmap_mappings_lock_release( void )
48{
49  rtems_libio_unlock();
50}
51
52#ifdef __cplusplus
53}
54#endif
55
56#endif
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