loader.h

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00001 /** \addtogroup sys
00002  * @{
00003  */
00004 
00005 /**
00006  * \defgroup loader The Contiki program loader
00007  *
00008  * The Contiki program loader is an abstract interface for loading and
00009  * starting programs.
00010  *
00011  * @{
00012  */
00013 
00014 /**
00015  * \file
00016  * Default definitions and error values for the Contiki program loader.
00017  * \author Adam Dunkels <adam@dunkels.com>
00018  *
00019  */
00020 
00021 /*
00022  * Copyright (c) 2003, Adam Dunkels.
00023  * All rights reserved.
00024  *
00025  * Redistribution and use in source and binary forms, with or without
00026  * modification, are permitted provided that the following conditions
00027  * are met:
00028  * 1. Redistributions of source code must retain the above copyright
00029  *    notice, this list of conditions and the following disclaimer.
00030  * 2. Redistributions in binary form must reproduce the above
00031  *    copyright notice, this list of conditions and the following
00032  *    disclaimer in the documentation and/or other materials provided
00033  *    with the distribution.
00034  * 3. The name of the author may not be used to endorse or promote
00035  *    products derived from this software without specific prior
00036  *    written permission.
00037  *
00038  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
00039  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00040  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00041  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
00042  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00043  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00044  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00045  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00046  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00047  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00048  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00049  *
00050  * This file is part of the Contiki desktop OS
00051  *
00052  * $Id: loader.h,v 1.2 2008/10/14 12:46:39 nvt-se Exp $
00053  *
00054  */
00055 #ifndef __LOADER_H__
00056 #define __LOADER_H__
00057 
00058 /* Errors that the LOADER_LOAD() function may return: */
00059 
00060 #define LOADER_OK                0       /**< No error. */
00061 #define LOADER_ERR_READ          1       /**< Read error. */
00062 #define LOADER_ERR_HDR           2       /**< Header error. */
00063 #define LOADER_ERR_OS            3       /**< Wrong OS. */
00064 #define LOADER_ERR_FMT           4       /**< Data format error. */
00065 #define LOADER_ERR_MEM           5       /**< Not enough memory. */
00066 #define LOADER_ERR_OPEN          6       /**< Could not open file. */
00067 #define LOADER_ERR_ARCH          7       /**< Wrong architecture. */
00068 #define LOADER_ERR_VERSION       8       /**< Wrong OS version. */
00069 #define LOADER_ERR_NOLOADER      9       /**< Program loading not supported. */
00070 
00071 #ifdef LOADER_CONF_ARCH
00072 #include LOADER_CONF_ARCH
00073 #endif /* LOADER_CONF_ARCH */
00074 
00075 /**
00076  * Load and execute a program.
00077  *
00078  * This macro is used for loading and executing a program, and
00079  * requires support from the architecture dependent code. The actual
00080  * program loading is made by architecture specific functions.
00081  *
00082  * \note A program loaded with LOADER_LOAD() must call the
00083  * LOADER_UNLOAD() function to unload itself.
00084  *
00085  * \param name The name of the program to be loaded.
00086  *
00087  * \param arg A pointer argument that is passed to the program.
00088  *
00089  * \return A loader error, or LOADER_OK if loading was successful.
00090  */
00091 #ifndef LOADER_LOAD
00092 #define LOADER_LOAD(name, arg) LOADER_ERR_NOLOADER
00093 #endif /* LOADER_LOAD */
00094 
00095 /**
00096  * Unload a program from memory.
00097  *
00098  * This macro is used for unloading a program and deallocating any
00099  * memory that was allocated during the loading of the program. This
00100  * function must be called by the program itself.
00101  *
00102  */
00103 #ifndef LOADER_UNLOAD
00104 #define LOADER_UNLOAD()
00105 #endif /* LOADER_UNLOAD */
00106 
00107 /**
00108  * Load a DSC (program description).
00109  *
00110  * Loads a DSC (program description) into memory and returns a pointer
00111  * to the dsc.
00112  *
00113  * \return A pointer to the DSC or NULL if it could not be loaded.
00114  */
00115 #ifndef LOADER_LOAD_DSC
00116 #define LOADER_LOAD_DSC(name) NULL
00117 #endif /* LOADER_LOAD_DSC */
00118 
00119 /**
00120  * Unload a DSC (program description).
00121  *
00122  * Unload a DSC from memory and deallocate any memory that was
00123  * allocated when it was loaded.
00124  */
00125 #ifndef LOADER_UNLOAD_DSC
00126 #define LOADER_UNLOAD_DSC(dsc)
00127 #endif /* LOADER_UNLOAD */
00128 
00129 #endif /* __LOADER_H__ */
00130 
00131 /** @} */
00132 /** @} */

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