Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/raid/asr/osd_util.h
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1 /*- 2 * Copyright (c) 1996-1999 Distributed Processing Technology Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source form, with or without modification, are 6 * permitted provided that redistributions of source code must retain the 7 * above copyright notice, this list of conditions and the following disclaimer. 8 * 9 * This software is provided `as is' by Distributed Processing Technology and 10 * any express or implied warranties, including, but not limited to, the 11 * implied warranties of merchantability and fitness for a particular purpose, 12 * are disclaimed. In no event shall Distributed Processing Technology be 13 * liable for any direct, indirect, incidental, special, exemplary or 14 * consequential damages (including, but not limited to, procurement of 15 * substitute goods or services; loss of use, data, or profits; or business 16 * interruptions) however caused and on any theory of liability, whether in 17 * contract, strict liability, or tort (including negligence or otherwise) 18 * arising in any way out of the use of this driver software, even if advised 19 * of the possibility of such damage. 20 * 21 * $FreeBSD: src/sys/dev/asr/osd_util.h,v 1.10 2005/01/06 01:42:29 imp Exp $ 22 */ 23 24 #ifndef __OSD_UTIL_H 25 #define __OSD_UTIL_H 26 27 /*File - OSD_UTIL.H 28 **************************************************************************** 29 * 30 *Description: 31 * 32 * This file contains defines and function prototypes that are 33 *operating system dependent. The resources defined in this file 34 *are not specific to any particular application. 35 * 36 *Copyright Distributed Processing Technology, Corp. 37 * 140 Candace Dr. 38 * Maitland, Fl. 32751 USA 39 * Phone: (407) 830-5522 Fax: (407) 260-5366 40 * All Rights Reserved 41 * 42 *Author: Doug Anderson 43 *Date: 1/7/94 44 * 45 *Editors: 46 * 47 *Remarks: 48 * 49 * 50 *****************************************************************************/ 51 52 53 /*Definitions - Defines & Constants ----------------------------------------- */ 54 55 /*----------------------------- */ 56 /* Operating system selections: */ 57 /*----------------------------- */ 58 59 /*#define _DPT_MSDOS */ 60 /*#define _DPT_WIN_3X */ 61 /*#define _DPT_WIN_4X */ 62 /*#define _DPT_WIN_NT */ 63 /*#define _DPT_NETWARE */ 64 /*#define _DPT_OS2 */ 65 /*#define _DPT_SCO */ 66 /*#define _DPT_UNIXWARE */ 67 /*#define _DPT_SOLARIS */ 68 /*#define _DPT_NEXTSTEP */ 69 /*#define _DPT_BANYAN */ 70 71 /*-------------------------------- */ 72 /* Include the OS specific defines */ 73 /*-------------------------------- */ 74 75 /*#define OS_SELECTION From Above List */ 76 /*#define SEMAPHORE_T ??? */ 77 /*#define DLL_HANDLE_T ??? */ 78 79 #include "osd_defs.h" 80 81 #ifndef DPT_UNALIGNED 82 #define DPT_UNALIGNED 83 #endif 84 85 #ifndef DPT_EXPORT 86 #define DPT_EXPORT 87 #endif 88 89 #ifndef DPT_IMPORT 90 #define DPT_IMPORT 91 #endif 92 93 #ifndef DPT_RUNTIME_IMPORT 94 #define DPT_RUNTIME_IMPORT DPT_IMPORT 95 #endif 96 97 /*--------------------- */ 98 /* OS dependent defines */ 99 /*--------------------- */ 100 101 #if defined(_DPT_MSDOS) || defined(_DPT_WIN_3X) 102 #define _DPT_16_BIT 103 #else 104 #define _DPT_32_BIT 105 #endif 106 107 #if defined(_DPT_SCO) || defined(_DPT_UNIXWARE) || defined(_DPT_SOLARIS) || defined(_DPT_AIX) || defined(SNI_MIPS) || defined(_DPT_BSDI) || defined(_DPT_FREE_BSD) || defined(_DPT_LINUX) 108 #define _DPT_UNIX 109 #endif 110 111 #if defined(_DPT_WIN_3x) || defined(_DPT_WIN_4X) || defined(_DPT_WIN_NT) \ 112 || defined(_DPT_OS2) 113 #define _DPT_DLL_SUPPORT 114 #endif 115 116 #if !defined(_DPT_MSDOS) && !defined(_DPT_WIN_3X) && !defined(_DPT_NETWARE) 117 #define _DPT_PREEMPTIVE 118 #endif 119 120 #if !defined(_DPT_MSDOS) && !defined(_DPT_WIN_3X) 121 #define _DPT_MULTI_THREADED 122 #endif 123 124 #if !defined(_DPT_MSDOS) 125 #define _DPT_MULTI_TASKING 126 #endif 127 128 /* These exist for platforms that */ 129 /* chunk when accessing mis-aligned */ 130 /* data */ 131 #if defined(SNI_MIPS) || defined(_DPT_SOLARIS) 132 #if defined(_DPT_BIG_ENDIAN) 133 #if !defined(_DPT_STRICT_ALIGN) 134 #define _DPT_STRICT_ALIGN 135 #endif 136 #endif 137 #endif 138 139 /* Determine if in C or C++ mode */ 140 #ifdef __cplusplus 141 #define _DPT_CPP 142 #else 143 #define _DPT_C 144 #endif 145 146 /*-------------------------------------------------------------------*/ 147 /* Under Solaris the compiler refuses to accept code like: */ 148 /* { {"DPT"}, 0, NULL .... }, */ 149 /* and complains about the {"DPT"} part by saying "cannot use { } */ 150 /* to initialize char*". */ 151 /* */ 152 /* By defining these ugly macros we can get around this and also */ 153 /* not have to copy and #ifdef large sections of code. I know that */ 154 /* these macros are *really* ugly, but they should help reduce */ 155 /* maintenance in the long run. */ 156 /* */ 157 /* In the meantime, just pray that we can all move to Win32 as soon */ 158 /* as possible... */ 159 /*-------------------------------------------------------------------*/ 160 #if !defined(DPTSQO) 161 #if defined(_DPT_SOLARIS) 162 #define DPTSQO 163 #define DPTSQC 164 #else 165 #define DPTSQO { 166 #define DPTSQC } 167 #endif /* solaris */ 168 #endif /* DPTSQO */ 169 170 171 /*---------------------- */ 172 /* OS dependent typedefs */ 173 /*---------------------- */ 174 175 #if defined(_DPT_MSDOS) || defined(_DPT_SCO) 176 #define BYTE unsigned char 177 #define WORD unsigned short 178 #endif 179 180 #ifndef _DPT_TYPEDEFS 181 #define _DPT_TYPEDEFS 182 typedef unsigned char uCHAR; 183 typedef unsigned short uSHORT; 184 typedef unsigned int uINT; 185 typedef unsigned long uLONG; 186 187 typedef union { 188 uCHAR u8[4]; 189 uSHORT u16[2]; 190 uLONG u32; 191 } access_U; 192 #endif 193 194 #if !defined(NULL) 195 #define NULL 0 196 #endif 197 198 199 /*Prototypes - function ----------------------------------------------------- */ 200 201 #ifdef __cplusplus 202 extern "C" { /* Declare all these functions as "C" functions */ 203 #endif 204 205 /*------------------------ */ 206 /* Byte reversal functions */ 207 /*------------------------ */ 208 209 /* Reverses the byte ordering of a 2 byte variable */ 210 #if (!defined(osdSwap2)) 211 uSHORT osdSwap2(DPT_UNALIGNED uSHORT *); 212 #endif /* !osdSwap2 */ 213 214 /* Reverses the byte ordering of a 4 byte variable and shifts left 8 bits */ 215 #if (!defined(osdSwap3)) 216 uLONG osdSwap3(DPT_UNALIGNED uLONG *); 217 #endif /* !osdSwap3 */ 218 219 220 #ifdef _DPT_NETWARE 221 #include "novpass.h" /* For DPT_Bswapl() prototype */ 222 /* Inline the byte swap */ 223 #ifdef __cplusplus 224 inline uLONG osdSwap4(uLONG *inLong) { 225 return *inLong = DPT_Bswapl(*inLong); 226 } 227 #else 228 #define osdSwap4(inLong) DPT_Bswapl(inLong) 229 #endif /* cplusplus */ 230 #else 231 /* Reverses the byte ordering of a 4 byte variable */ 232 # if (!defined(osdSwap4)) 233 uLONG osdSwap4(DPT_UNALIGNED uLONG *); 234 # endif /* !osdSwap4 */ 235 236 /* The following functions ALWAYS swap regardless of the * 237 * presence of DPT_BIG_ENDIAN */ 238 239 uSHORT trueSwap2(DPT_UNALIGNED uSHORT *); 240 uLONG trueSwap4(DPT_UNALIGNED uLONG *); 241 242 #endif /* netware */ 243 244 245 /*-------------------------------------* 246 * Network order swap functions * 247 * * 248 * These functions/macros will be used * 249 * by the structure insert()/extract() * 250 * functions. * 251 * 252 * We will enclose all structure * 253 * portability modifications inside * 254 * #ifdefs. When we are ready, we * 255 * will #define DPT_PORTABLE to begin * 256 * using the modifications. * 257 *-------------------------------------*/ 258 uLONG netSwap4(uLONG val); 259 260 #if defined(_DPT_BIG_ENDIAN) 261 262 /* for big-endian we need to swap */ 263 264 #ifndef NET_SWAP_2 265 #define NET_SWAP_2(x) (((x) >> 8) | ((x) << 8)) 266 #endif /* NET_SWAP_2 */ 267 268 #ifndef NET_SWAP_4 269 #define NET_SWAP_4(x) netSwap4((x)) 270 #endif /* NET_SWAP_4 */ 271 272 #else 273 274 /* for little-endian we don't need to do anything */ 275 276 #ifndef NET_SWAP_2 277 #define NET_SWAP_2(x) (x) 278 #endif /* NET_SWAP_2 */ 279 280 #ifndef NET_SWAP_4 281 #define NET_SWAP_4(x) (x) 282 #endif /* NET_SWAP_4 */ 283 284 #endif /* big endian */ 285 286 287 288 /*----------------------------------- */ 289 /* Run-time loadable module functions */ 290 /*----------------------------------- */ 291 292 /* Loads the specified run-time loadable DLL */ 293 DLL_HANDLE_T osdLoadModule(uCHAR *); 294 /* Unloads the specified run-time loadable DLL */ 295 uSHORT osdUnloadModule(DLL_HANDLE_T); 296 /* Returns a pointer to a function inside a run-time loadable DLL */ 297 void * osdGetFnAddr(DLL_HANDLE_T,uCHAR *); 298 299 /*--------------------------------------- */ 300 /* Mutually exclusive semaphore functions */ 301 /*--------------------------------------- */ 302 303 /* Create a named semaphore */ 304 SEMAPHORE_T osdCreateNamedSemaphore(char *); 305 /* Create a mutually exlusive semaphore */ 306 SEMAPHORE_T osdCreateSemaphore(void); 307 /* create an event semaphore */ 308 SEMAPHORE_T osdCreateEventSemaphore(void); 309 /* create a named event semaphore */ 310 SEMAPHORE_T osdCreateNamedEventSemaphore(char *); 311 312 /* Destroy the specified mutually exclusive semaphore object */ 313 uSHORT osdDestroySemaphore(SEMAPHORE_T); 314 /* Request access to the specified mutually exclusive semaphore */ 315 uLONG osdRequestSemaphore(SEMAPHORE_T,uLONG); 316 /* Release access to the specified mutually exclusive semaphore */ 317 uSHORT osdReleaseSemaphore(SEMAPHORE_T); 318 /* wait for an event to happen */ 319 uLONG osdWaitForEventSemaphore(SEMAPHORE_T, uLONG); 320 /* signal an event */ 321 uLONG osdSignalEventSemaphore(SEMAPHORE_T); 322 /* reset the event */ 323 uLONG osdResetEventSemaphore(SEMAPHORE_T); 324 325 /*----------------- */ 326 /* Thread functions */ 327 /*----------------- */ 328 329 /* Releases control to the task switcher in non-preemptive */ 330 /* multitasking operating systems. */ 331 void osdSwitchThreads(void); 332 333 /* Starts a thread function */ 334 uLONG osdStartThread(void *,void *); 335 336 /* what is my thread id */ 337 uLONG osdGetThreadID(void); 338 339 /* wakes up the specifed thread */ 340 void osdWakeThread(uLONG); 341 342 /* osd sleep for x miliseconds */ 343 void osdSleep(uLONG); 344 345 #define DPT_THREAD_PRIORITY_LOWEST 0x00 346 #define DPT_THREAD_PRIORITY_NORMAL 0x01 347 #define DPT_THREAD_PRIORITY_HIGHEST 0x02 348 349 uCHAR osdSetThreadPriority(uLONG tid, uCHAR priority); 350 351 #ifdef __cplusplus 352 } /* end the xtern "C" declaration */ 353 #endif 354 355 #endif /* osd_util_h */
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