source: rtems/cpukit/include/rtems/posix/ptimer.h @ 2afb22b

5
Last change on this file since 2afb22b 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 Timers Private Support
5 *
6 * This include file contains all the private support information for
7 * POSIX timers.
8 */
9
10/*
11 *  Initial Implementation:
12 *    COPYRIGHT (c) 1998.  Alfonso Escalera Piña
13 *    Largely rewritten by Joel Sherrill (1999).
14 *
15 *  COPYRIGHT (c) 1999-2013.
16 *  On-Line Applications Research Corporation (OAR).
17 *
18 *  The license and distribution terms for this file may be
19 *  found in the file LICENSE in this distribution or at
20 *  http://www.rtems.org/license/LICENSE.
21 */
22
23#ifndef _RTEMS_POSIX_PTIMER_H
24#define _RTEMS_POSIX_PTIMER_H
25
26/**
27 * @defgroup POSIX_PRIV_TIMERS POSIX Timers
28 *
29 * @ingroup POSIXAPI
30 */
31/**@{**/
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36#include <rtems/posix/config.h>
37
38/**
39 *  @brief Create a Per-Process Timer
40 */
41int timer_create(
42  clockid_t        clock_id,
43  struct sigevent *evp,
44  timer_t         *timerid
45);
46
47/**
48 *  @brief Delete a Per-Process Timer
49 */
50int timer_delete(
51  timer_t timerid
52);
53
54/**
55 *  @brief Set a Per-Process Timer
56 */
57int timer_settime(
58  timer_t                  timerid,
59  int                      flags,
60  const struct itimerspec *value,
61  struct itimerspec       *ovalue
62);
63
64/**
65 *  @brief Set a Per-Process Timer
66 */
67int timer_gettime(
68  timer_t            timerid,
69  struct itimerspec *value
70);
71
72/**
73 * @brief Get overrun count for a Per-Process Timer
74 *
75 * The expiration of a timer must increase by one a counter.
76 * After the signal handler associated to the timer finishes
77 * its execution, _POSIX_Timer_TSR will have to set this counter to 0.
78 */
79int timer_getoverrun(
80  timer_t   timerid
81);
82
83#ifdef __cplusplus
84}
85#endif
86/** @} */
87
88#endif /* _RTEMS_POSIX_PTIMER_H */
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