source: rtems/cpukit/include/rtems/score/threadmp.h @ 21275b58

Last change on this file since 21275b58 was 2afb22b, checked in by Chris Johns <chrisj@…>, on Dec 23, 2017 at 7:18:56 AM

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: 2.8 KB
Line 
1/**
2 *  @file  rtems/score/threadmp.h
3 *
4 *  @brief Multiprocessing Portion of the Thread Package
5 *
6 *  This include file contains the specification for all routines
7 *  and data specific to the multiprocessing portion of the thread package.
8 */
9
10/*
11 *  COPYRIGHT (c) 1989-2009.
12 *  On-Line Applications Research Corporation (OAR).
13 *
14 *  The license and distribution terms for this file may be
15 *  found in the file LICENSE in this distribution or at
16 *  http://www.rtems.org/license/LICENSE.
17 */
18
19#ifndef _RTEMS_SCORE_THREADMP_H
20#define _RTEMS_SCORE_THREADMP_H
21
22#ifndef _RTEMS_SCORE_THREADIMPL_H
23# error "Never use <rtems/score/threadmp.h> directly; include <rtems/score/threadimpl.h> instead."
24#endif
25
26#include <rtems/score/mpciimpl.h>
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
32/**
33 *  @defgroup ScoreThreadMP Thread Handler Multiprocessing Support
34 *
35 *  @ingroup Score
36 *
37 *  This handler encapsulates functionality which is related to managing
38 *  threads in a multiprocessor system configuration.  This handler must
39 *  manage proxies which represent remote threads blocking on local
40 *  operations.
41 */
42/**@{*/
43
44/**
45 *  @brief Initialize MP thread handler.
46 *
47 *  This routine initializes the multiprocessing portion of the Thread Handler.
48 */
49void _Thread_MP_Handler_initialization (
50  uint32_t   maximum_proxies
51);
52
53/**
54 *  @brief Allocate a MP proxy control block from
55 *  the inactive chain of free proxy control blocks.
56 *
57 *  This  allocates a proxy control block from
58 *  the inactive chain of free proxy control blocks.
59 *
60 *  @note This function returns a thread control pointer
61 *        because proxies are substitutes for remote threads.
62 */
63Thread_Control *_Thread_MP_Allocate_proxy (
64  States_Control the_state
65);
66
67/**
68 *  @brief Removes the MP proxy control block for the specified
69 *  id from the active chain of proxy control blocks.
70 *
71 *  This function removes the proxy control block for the specified
72 *  id from the active red-black tree of proxy control blocks.
73 */
74Thread_Control *_Thread_MP_Find_proxy (
75  Objects_Id the_id
76);
77
78/**
79 * This function returns true if the thread in question is the
80 * multiprocessing receive thread.
81 *
82 * @note This is a macro to avoid needing a prototype for
83 *       _MPCI_Receive_server_tcb until it is used.
84 */
85#define _Thread_MP_Is_receive(_the_thread) \
86  ((_the_thread) == _MPCI_Receive_server_tcb)
87
88/**
89 * This routine frees a proxy control block to the
90 * inactive chain of free proxy control blocks.
91 */
92void _Thread_MP_Free_proxy( Thread_Control *the_thread );
93
94RTEMS_INLINE_ROUTINE bool _Thread_MP_Is_remote( Objects_Id id )
95{
96  Objects_Information *information;
97
98  information = _Thread_Get_objects_information( id );
99  if ( information == NULL ) {
100    return false;
101  }
102
103  return _Objects_MP_Is_remote( id, information );
104}
105
106/**@}*/
107
108#ifdef __cplusplus
109}
110#endif
111
112#endif
113/* end of include file */
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