nsprpub/pr/include/md/_nextstep.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is the Netscape Portable Runtime (NSPR).
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1998-2000
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
  29  * under the terms of either the GPL or the LGPL, and not to allow others to
  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
  32  * and other provisions required by the GPL or the LGPL. If you do not delete
  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #ifndef nspr_nextstep_defs_h___
  39 #define nspr_nextstep_defs_h___
  40
  41 #include "prthread.h"
  42
  43 #include <bsd/libc.h>
  44 #include <bsd/syscall.h>
  45
  46 /*      syscall() is not declared in NEXTSTEP's syscall.h ...
  47 */
  48 extern int syscall(int number, ...);
  49
  50 /*
  51  * Internal configuration macros
  52  */
  53
  54 #define PR_LINKER_ARCH  "nextstep"
  55 #define _PR_SI_SYSNAME  "NEXTSTEP"
  56 #if defined(__sparc__)
  57 #define _PR_SI_ARCHITECTURE "sparc"
  58 #elif defined(__m68k__)
  59 #define _PR_SI_ARCHITECTURE "m68k"
  60 #elif defined(__i386__)
  61 #define _PR_SI_ARCHITECTURE "x86"
  62 #else
  63 error Unknown NEXTSTEP architecture
  64 #endif
  65 #define PR_DLL_SUFFIX           ".so"
  66
  67 #define _PR_VMBASE              0x30000000
  68 #define _PR_STACK_VMBASE        0x50000000
  69 #define _MD_DEFAULT_STACK_SIZE  65536L
  70 #define _MD_MMAP_FLAGS          MAP_PRIVATE
  71
  72 #undef  HAVE_STACK_GROWING_UP
  73
  74 #define HAVE_WEAK_MALLOC_SYMBOLS
  75
  76 #define HAVE_DLL
  77 #define USE_MACH_DYLD
  78 #define _PR_STAT_HAS_ONLY_ST_ATIME
  79 #define _PR_NO_LARGE_FILES
  80
  81 #define USE_SETJMP
  82
  83 #ifndef _PR_PTHREADS
  84
  85 #include <setjmp.h>
  86
  87 #define PR_CONTEXT_TYPE jmp_buf
  88
  89 #define CONTEXT(_th) ((_th)->md.context)
  90
  91 /* balazs.pataki@sztaki.hu:
  92 ** __sparc__ is checked
  93 ** __m68k__ is checked
  94 ** __i386__ is a guess (one of the two defines should work)
  95 */
  96 #if defined(__sparc__)
  97 #define _MD_GET_SP(_th)         (_th)->md.context[2]
  98 #elif defined(__m68k__)
  99 #define _MD_GET_SP(_th)         (_th)->md.context[2]
 100 #elif defined(__i386__)
 101 /* One of this two must be OK ... try using sc_onstack
 102 */
 103 #define _MD_GET_SP(_th)    (((struct sigcontext *) (_th)->md.context)->sc_onstack)
 104 //#define _MD_GET_SP(_th)               (_th)->md.context[0].sc_esp
 105 #else
 106 error Unknown NEXTSTEP architecture
 107 #endif
 108
 109 #define PR_NUM_GCREGS   _JBLEN
 110
 111 /*
 112 ** Initialize a thread context to run "_main()" when started
 113 */
 114 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status)  \
 115 {  \
 116     *status = PR_TRUE;  \
 117     if (setjmp(CONTEXT(_thread))) {  \
 118         _main();  \
 119     }  \
 120     _MD_GET_SP(_thread) = (int) ((_sp) - 64); \
 121 }
 122
 123 #define _MD_SWITCH_CONTEXT(_thread)  \
 124     if (!setjmp(CONTEXT(_thread))) {  \
 125         (_thread)->md.errcode = errno;  \
 126         _PR_Schedule();  \
 127     }
 128
 129 /*
 130 ** Restore a thread context, saved by _MD_SWITCH_CONTEXT
 131 */
 132 #define _MD_RESTORE_CONTEXT(_thread) \
 133 {   \
 134     errno = (_thread)->md.errcode;  \
 135     _MD_SET_CURRENT_THREAD(_thread);  \
 136     longjmp(CONTEXT(_thread), 1);  \
 137 }
 138
 139 /* Machine-dependent (MD) data structures */
 140
 141 struct _MDThread {
 142     PR_CONTEXT_TYPE context;
 143     int id;
 144     int errcode;
 145 };
 146
 147 struct _MDThreadStack {
 148     PRInt8 notused;
 149 };
 150
 151 struct _MDLock {
 152     PRInt8 notused;
 153 };
 154
 155 struct _MDSemaphore {
 156     PRInt8 notused;
 157 };
 158
 159 struct _MDCVar {
 160     PRInt8 notused;
 161 };
 162
 163 struct _MDSegment {
 164     PRInt8 notused;
 165 };
 166
 167 /*
 168  * md-specific cpu structure field
 169  */
 170 #define _PR_MD_MAX_OSFD FD_SETSIZE
 171
 172 struct _MDCPU_Unix {
 173     PRCList ioQ;
 174     PRUint32 ioq_timeout;
 175     PRInt32 ioq_max_osfd;
 176     PRInt32 ioq_osfd_cnt;
 177 #ifndef _PR_USE_POLL
 178     fd_set fd_read_set, fd_write_set, fd_exception_set;
 179     PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
 180                                 fd_exception_cnt[_PR_MD_MAX_OSFD];
 181 #else
 182         struct pollfd *ioq_pollfds;
 183         int ioq_pollfds_size;
 184 #endif  /* _PR_USE_POLL */
 185 };
 186
 187 #define _PR_IOQ(_cpu)                   ((_cpu)->md.md_unix.ioQ)
 188 #define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
 189 #define _PR_FD_READ_SET(_cpu)           ((_cpu)->md.md_unix.fd_read_set)
 190 #define _PR_FD_READ_CNT(_cpu)           ((_cpu)->md.md_unix.fd_read_cnt)
 191 #define _PR_FD_WRITE_SET(_cpu)          ((_cpu)->md.md_unix.fd_write_set)
 192 #define _PR_FD_WRITE_CNT(_cpu)          ((_cpu)->md.md_unix.fd_write_cnt)
 193 #define _PR_FD_EXCEPTION_SET(_cpu)      ((_cpu)->md.md_unix.fd_exception_set)
 194 #define _PR_FD_EXCEPTION_CNT(_cpu)      ((_cpu)->md.md_unix.fd_exception_cnt)
 195 #define _PR_IOQ_TIMEOUT(_cpu)           ((_cpu)->md.md_unix.ioq_timeout)
 196 #define _PR_IOQ_MAX_OSFD(_cpu)          ((_cpu)->md.md_unix.ioq_max_osfd)
 197 #define _PR_IOQ_OSFD_CNT(_cpu)          ((_cpu)->md.md_unix.ioq_osfd_cnt)
 198 #define _PR_IOQ_POLLFDS(_cpu)           ((_cpu)->md.md_unix.ioq_pollfds)
 199 #define _PR_IOQ_POLLFDS_SIZE(_cpu)      ((_cpu)->md.md_unix.ioq_pollfds_size)
 200
 201 #define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu)  32
 202
 203 struct _MDCPU {
 204         struct _MDCPU_Unix md_unix;
 205 };
 206
 207 #define _MD_INIT_LOCKS()
 208 #define _MD_NEW_LOCK(lock) PR_SUCCESS
 209 #define _MD_FREE_LOCK(lock)
 210 #define _MD_LOCK(lock)
 211 #define _MD_UNLOCK(lock)
 212 #define _MD_INIT_IO()
 213 #define _MD_IOQ_LOCK()
 214 #define _MD_IOQ_UNLOCK()
 215
 216 extern PRStatus _MD_InitializeThread(PRThread *thread);
 217
 218 #define _MD_INIT_RUNNING_CPU(cpu)       _MD_unix_init_running_cpu(cpu)
 219 #define _MD_INIT_THREAD                 _MD_InitializeThread
 220 #define _MD_EXIT_THREAD(thread)
 221 #define _MD_SUSPEND_THREAD(thread)      _MD_suspend_thread
 222 #define _MD_RESUME_THREAD(thread)       _MD_resume_thread
 223 #define _MD_CLEAN_THREAD(_thread)
 224
 225 extern PRStatus _MD_CREATE_THREAD(
 226     PRThread *thread,
 227     void (*start) (void *),
 228     PRThreadPriority priority,
 229     PRThreadScope scope,
 230     PRThreadState state,
 231     PRUint32 stackSize);
 232 extern void _MD_SET_PRIORITY(struct _MDThread *thread, PRUintn newPri);
 233 extern PRStatus _MD_WAIT(PRThread *, PRIntervalTime timeout);
 234 extern PRStatus _MD_WAKEUP_WAITER(PRThread *);
 235 extern void _MD_YIELD(void);
 236
 237 #endif /* ! _PR_PTHREADS */
 238
 239 extern void _MD_EarlyInit(void);
 240 extern PRIntervalTime _PR_UNIX_GetInterval(void);
 241 extern PRIntervalTime _PR_UNIX_TicksPerSecond(void);
 242
 243 #define _MD_EARLY_INIT                  _MD_EarlyInit
 244 #define _MD_FINAL_INIT                  _PR_UnixInit
 245 #define _MD_GET_INTERVAL                  _PR_UNIX_GetInterval
 246 #define _MD_INTERVAL_PER_SEC              _PR_UNIX_TicksPerSecond
 247
 248 /*
 249  * We wrapped the select() call.  _MD_SELECT refers to the built-in,
 250  * unwrapped version.
 251  */
 252 #define _MD_SELECT(nfds,r,w,e,tv) syscall(SYS_select,nfds,r,w,e,tv)
 253
 254 /* For writev() */
 255 #include <sys/uio.h>
 256
 257 /* signal.h */
 258 /*      balazs.pataki@sztaki.hu: this is stolen from sunos4.h. The things is that
 259 **      NEXTSTEP doesn't support these flags for `struct sigaction's sa_flags, so
 260 **      I have to fake them ...
 261 */
 262 #define SA_RESTART 0
 263
 264 /* mmap */
 265 /*      balazs.pataki@sztaki.hu: NEXTSTEP doesn't have mmap, at least not
 266 **      publically. We have sys/mman.h, but it doesn't declare mmap(), and
 267 **      PROT_NONE is also missing. syscall.h has entries for mmap, munmap, and
 268 **      mprotect so I wrap these in nextstep.c as  mmap(), munmap() and mprotect()
 269 **      and pray for it to work.
 270 **
 271 */
 272 caddr_t mmap(caddr_t addr, size_t len, int prot, int flags,
 273           int fildes, off_t off);
 274 int munmap(caddr_t addr, size_t len);
 275 int mprotect(caddr_t addr, size_t len, int prot);
 276
 277 /*      my_mmap() is implemented in nextstep.c and is based on map_fd() of mach.
 278 */
 279 caddr_t my_mmap(caddr_t addr, size_t len, int prot, int flags,
 280           int fildes, off_t off);
 281 int my_munmap(caddr_t addr, size_t len);
 282
 283
 284 /*      string.h
 285 */
 286 /* balazs.pataki@sztaki.hu: this is missing so implemenetd in nextstep.c ...
 287 */
 288 char *strdup(const char *s1);
 289
 290 /* unistd.h
 291 */
 292 /*      balazs.pataki@sztaki.hu: these functions are hidden, though correctly
 293 **      implemented in NEXTSTEP. Here I give the declaration for them to be used
 294 **      by prmalloc.c, and I have a wrapped syscall() version of them in nextstep.c
 295 */
 296 int brk(void *endds);
 297 void *sbrk(int incr);
 298
 299 #endif /* nspr_nextstep_defs_h___ */