diff options
| author | Michael Gielda <mgielda@antmicro.com> | 2014-04-03 14:53:04 +0200 |
|---|---|---|
| committer | Michael Gielda <mgielda@antmicro.com> | 2014-04-03 14:53:04 +0200 |
| commit | ae1e4e08a1005a0c487f03ba189d7536e7fdcba6 (patch) | |
| tree | f1c296f8a966a9a39876b0e98e16d9c5da1776dd /ecos/packages/compat/posix/current/include/semaphore.h | |
| parent | f157da5337118d3c5cd464266796de4262ac9dbd (diff) | |
Added the OS files
Diffstat (limited to 'ecos/packages/compat/posix/current/include/semaphore.h')
| -rw-r--r-- | ecos/packages/compat/posix/current/include/semaphore.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/ecos/packages/compat/posix/current/include/semaphore.h b/ecos/packages/compat/posix/current/include/semaphore.h new file mode 100644 index 0000000..418d637 --- /dev/null +++ b/ecos/packages/compat/posix/current/include/semaphore.h @@ -0,0 +1,126 @@ +#ifndef CYGONCE_SEMAPHORE_H +#define CYGONCE_SEMAPHORE_H +//============================================================================= +// +// semaphore.h +// +// POSIX semaphore header +// +//============================================================================= +// ####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later +// version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT +// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License +// along with eCos; if not, write to the Free Software Foundation, Inc., +// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +// +// As a special exception, if other files instantiate templates or use +// macros or inline functions from this file, or you compile this file +// and link it with other works to produce a work based on this file, +// this file does not by itself cause the resulting work to be covered by +// the GNU General Public License. However the source code for this file +// must still be made available in accordance with section (3) of the GNU +// General Public License v2. +// +// This exception does not invalidate any other reasons why a work based +// on this file might be covered by the GNU General Public License. +// ------------------------------------------- +// ####ECOSGPLCOPYRIGHTEND#### +//============================================================================= +//#####DESCRIPTIONBEGIN#### +// +// Author(s): nickg +// Contributors: nickg +// Date: 2000-03-17 +// Purpose: POSIX semaphore header +// Description: This header contains all the definitions needed to support +// semaphores under eCos. The reader is referred to the POSIX +// standard or equivalent documentation for details of the +// functionality contained herein. +// +// Usage: +// #include <semaphore.h> +// ... +// +// +//####DESCRIPTIONEND#### +// +//============================================================================= + +#include <pkgconf/hal.h> +#include <pkgconf/kernel.h> +#include <pkgconf/posix.h> + +#include <stddef.h> // NULL, size_t + +#include <limits.h> + +#include <sys/types.h> + +//----------------------------------------------------------------------------- +// Semaphore object definition + +// This structure must exactly correspond in size and layout to the underlying +// eCos C++ class that implements this object. + +typedef struct +{ + CYG_WORD32 sem_value; + CYG_ADDRESS sem_queue; +} sem_t; + +//----------------------------------------------------------------------------- +// Semaphore functions + +// Initialize semaphore to value. +// pshared is not supported under eCos. +externC int sem_init (sem_t *sem, int pshared, unsigned int value); + +// Destroy the semaphore. +externC int sem_destroy (sem_t *sem); + +// Decrement value if >0 or wait for a post. +externC int sem_wait (sem_t *sem); + +// Decrement value if >0, return -1 if not. +externC int sem_trywait (sem_t *sem); + +// Increment value and wake a waiter if one is present. +externC int sem_post (sem_t *sem); + +// Get current value +externC int sem_getvalue (sem_t *sem, int *sval); + +//----------------------------------------------------------------------------- +// Named semaphore functions +// These are an optional feature under eCos + +// Open an existing named semaphore, or create it. +externC sem_t *sem_open (const char *name, int oflag, ...); + +// Close descriptor for semaphore. +externC int sem_close (sem_t *sem); + +// Remove named semaphore +externC int sem_unlink (const char *name); + +//----------------------------------------------------------------------------- +// Special return value for sem_open() + +#define SEM_FAILED ((sem_t *)NULL) + +//----------------------------------------------------------------------------- +#endif // ifndef CYGONCE_SEMAPHORE_H +// End of semaphore.h |
