third_party/npapi/npspy/extern/nspr/md/_reliantunix.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /*
   3  * The contents of this file are subject to the Mozilla Public
   4  * License Version 1.1 (the "License"); you may not use this file
   5  * except in compliance with the License. You may obtain a copy of
   6  * the License at http://www.mozilla.org/MPL/
   7  *
   8  * Software distributed under the License is distributed on an "AS
   9  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  10  * implied. See the License for the specific language governing
  11  * rights and limitations under the License.
  12  *
  13  * The Original Code is the Netscape Portable Runtime (NSPR).
  14  *
  15  * The Initial Developer of the Original Code is Netscape
  16  * Communications Corporation.  Portions created by Netscape are
  17  * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
  18  * Rights Reserved.
  19  *
  20  * Contributor(s):
  21  *
  22  * Alternatively, the contents of this file may be used under the
  23  * terms of the GNU General Public License Version 2 or later (the
  24  * "GPL"), in which case the provisions of the GPL are applicable
  25  * instead of those above.  If you wish to allow use of your
  26  * version of this file only under the terms of the GPL and not to
  27  * allow others to use your version of this file under the MPL,
  28  * indicate your decision by deleting the provisions above and
  29  * replace them with the notice and other provisions required by
  30  * the GPL.  If you do not delete the provisions above, a recipient
  31  * may use your version of this file under either the MPL or the
  32  * GPL.
  33  */
  34
  35 /*
  36  * reliantunix.h
  37  * 5/18/96 Taken from nec.h -- chrisk@netscape.com
  38  * 3/14/97 Modified for nspr20 -- chrisk@netscape.com
  39  */
  40 #ifndef nspr_reliantunix_defs_h___
  41 #define nspr_reliantunix_defs_h___
  42
  43 /*
  44  * Internal configuration macros
  45  */
  46
  47 #define PR_LINKER_ARCH  "sinix"
  48 #define _PR_SI_SYSNAME  "SINIX"
  49 #define _PR_SI_ARCHITECTURE "mips"
  50 #define PR_DLL_SUFFIX ".so"
  51
  52 #define _PR_VMBASE              0x30000000
  53 #define _PR_STACK_VMBASE        0x50000000
  54 #define _MD_DEFAULT_STACK_SIZE  (2*65536L)
  55 #define _MD_MMAP_FLAGS          MAP_PRIVATE|MAP_FIXED
  56
  57 #undef  HAVE_STACK_GROWING_UP
  58 #define HAVE_DLL
  59 #define USE_DLFCN
  60 #define NEED_STRFTIME_LOCK
  61 #define NEED_TIME_R
  62 #define HAVE_NETCONFIG
  63 #define HAVE_WEAK_IO_SYMBOLS
  64 #define HAVE_WEAK_MALLOC_SYMBOLS
  65 #define _PR_RECV_BROKEN /* recv doesn't work on Unix Domain Sockets */
  66 #define _PR_POLL_AVAILABLE
  67 #define _PR_USE_POLL
  68 #define _PR_STAT_HAS_ST_ATIM
  69 #define _PR_NO_LARGE_FILES
  70
  71 /*
  72  * Mike Patnode indicated that it is possibly safe now to use context-switching
  73  * calls that do not change the signal mask, like setjmp vs. sigsetjmp.
  74  * So we'll use our homegrown, getcontext/setcontext-compatible stuff which
  75  * will save us the getcontext/setcontext system calls at each context switch.
  76  * It already works in FastTrack 2.01, so it should do it here :-)
  77  *  - chrisk 040497
  78  */
  79 #define USE_SETCXT /* temporarily disabled... */
  80
  81 #include <ucontext.h>
  82
  83 #ifdef USE_SETCXT
  84 /* use non-syscall machine language replacement */
  85 #define _GETCONTEXT             getcxt
  86 #define _SETCONTEXT             setcxt
  87 /* defined in os_ReliantUNIX.s */
  88 extern int getcxt(ucontext_t *);
  89 extern int setcxt(ucontext_t *);
  90 #else
  91 #define _GETCONTEXT             getcontext
  92 #define _SETCONTEXT             setcontext
  93 #endif
  94
  95 #define _MD_GET_SP(_t)          (_t)->md.context.uc_mcontext.gpregs[CXT_SP]
  96 #define _PR_CONTEXT_TYPE        ucontext_t
  97 #define _PR_NUM_GCREGS          NGREG
  98
  99 #define CONTEXT(_thread) (&(_thread)->md.context)
 100
 101 #define _PR_IS_NATIVE_THREAD_SUPPORTED() 0
 102
 103 /*
 104 ** Machine-dependent (MD) data structures.
 105 */
 106 struct _MDThread {
 107     _PR_CONTEXT_TYPE context;
 108     int id;
 109     int errcode;
 110 };
 111
 112 struct _MDThreadStack {
 113     PRInt8 notused;
 114 };
 115
 116 struct _MDLock {
 117     PRInt8 notused;
 118 };
 119
 120 struct _MDSemaphore {
 121     PRInt8 notused;
 122 };
 123
 124 struct _MDCVar {
 125     PRInt8 notused;
 126 };
 127
 128 struct _MDSegment {
 129     PRInt8 notused;
 130 };
 131
 132 /*
 133  * md-specific cpu structure field
 134  */
 135 #define _PR_MD_MAX_OSFD FD_SETSIZE
 136
 137 struct _MDCPU_Unix {
 138     PRCList ioQ;
 139     PRUint32 ioq_timeout;
 140     PRInt32 ioq_max_osfd;
 141     PRInt32 ioq_osfd_cnt;
 142 #ifndef _PR_USE_POLL
 143     fd_set fd_read_set, fd_write_set, fd_exception_set;
 144     PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
 145                                 fd_exception_cnt[_PR_MD_MAX_OSFD];
 146 #else
 147         struct pollfd *ioq_pollfds;
 148         int ioq_pollfds_size;
 149 #endif  /* _PR_USE_POLL */
 150 };
 151
 152 #define _PR_IOQ(_cpu)                   ((_cpu)->md.md_unix.ioQ)
 153 #define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
 154 #define _PR_FD_READ_SET(_cpu)           ((_cpu)->md.md_unix.fd_read_set)
 155 #define _PR_FD_READ_CNT(_cpu)           ((_cpu)->md.md_unix.fd_read_cnt)
 156 #define _PR_FD_WRITE_SET(_cpu)          ((_cpu)->md.md_unix.fd_write_set)
 157 #define _PR_FD_WRITE_CNT(_cpu)          ((_cpu)->md.md_unix.fd_write_cnt)
 158 #define _PR_FD_EXCEPTION_SET(_cpu)      ((_cpu)->md.md_unix.fd_exception_set)
 159 #define _PR_FD_EXCEPTION_CNT(_cpu)      ((_cpu)->md.md_unix.fd_exception_cnt)
 160 #define _PR_IOQ_TIMEOUT(_cpu)           ((_cpu)->md.md_unix.ioq_timeout)
 161 #define _PR_IOQ_MAX_OSFD(_cpu)          ((_cpu)->md.md_unix.ioq_max_osfd)
 162 #define _PR_IOQ_OSFD_CNT(_cpu)          ((_cpu)->md.md_unix.ioq_osfd_cnt)
 163 #define _PR_IOQ_POLLFDS(_cpu)           ((_cpu)->md.md_unix.ioq_pollfds)
 164 #define _PR_IOQ_POLLFDS_SIZE(_cpu)      ((_cpu)->md.md_unix.ioq_pollfds_size)
 165
 166 #define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu)  32
 167
 168 struct _MDCPU {
 169         struct _MDCPU_Unix md_unix;
 170 };
 171
 172 #define _MD_INIT_LOCKS()
 173 #define _MD_NEW_LOCK(lock) PR_SUCCESS
 174 #define _MD_FREE_LOCK(lock)
 175 #define _MD_LOCK(lock)
 176 #define _MD_UNLOCK(lock)
 177 #define _MD_INIT_IO()
 178 #define _MD_IOQ_LOCK()
 179 #define _MD_IOQ_UNLOCK()
 180
 181 /*
 182 ** Initialize the thread context preparing it to execute "_main()"
 183 ** - get a nice, fresh context
 184 ** - set its SP to the stack we allcoated for it
 185 ** - set it to start things at "e"
 186 */
 187 #define _MD_INIT_CONTEXT(thread, _sp, _main, status)                \
 188     PR_BEGIN_MACRO                                                  \
 189     *status = PR_TRUE;                                              \
 190     _GETCONTEXT(CONTEXT(thread));                                   \
 191     /* this is supposed to point to the stack BASE, not to SP */    \
 192     CONTEXT(thread)->uc_stack.ss_sp = thread->stack->stackBottom;   \
 193     CONTEXT(thread)->uc_stack.ss_size = thread->stack->stackSize;   \
 194     CONTEXT(thread)->uc_mcontext.gpregs[CXT_SP] = ((unsigned long)_sp - 128) & 0xfffffff8; \
 195     CONTEXT(thread)->uc_mcontext.gpregs[CXT_T9] = _main;            \
 196     CONTEXT(thread)->uc_mcontext.gpregs[CXT_EPC] = _main;           \
 197     CONTEXT(thread)->uc_mcontext.gpregs[CXT_RA] = 0;                \
 198     thread->no_sched = 0;                                           \
 199     PR_END_MACRO
 200
 201 /*
 202 ** Save current context as it is scheduled away
 203 */
 204 #define _MD_SWITCH_CONTEXT(_thread)       \
 205     PR_BEGIN_MACRO                        \
 206     if (!_GETCONTEXT(CONTEXT(_thread))) { \
 207         _MD_SAVE_ERRNO(_thread);          \
 208         _MD_SET_LAST_THREAD(_thread);     \
 209         _PR_Schedule();                   \
 210     }                                     \
 211     PR_END_MACRO
 212
 213 /*
 214 ** Restore a thread context, saved by _MD_SWITCH_CONTEXT or set up
 215 **  by _MD_INIT_CONTEXT
 216 **  CXT_V0 is the register that holds the return value.
 217 **   We must set it to 1 so that we can see if the return from
 218 **   getcontext() is the result of calling getcontext() or
 219 **   setcontext()...
 220 **   setting a context got with getcontext() appears to
 221 **   return from getcontext(), too!
 222 **  CXT_A3 is the register that holds status when returning
 223 **   from a syscall. It is set to 0 to indicate success,
 224 **   because we want getcontext() on the other side of the magic
 225 **   door to be ok.
 226 */
 227 #define _MD_RESTORE_CONTEXT(_thread)   \
 228     PR_BEGIN_MACRO                     \
 229     ucontext_t *uc = CONTEXT(_thread); \
 230     uc->uc_mcontext.gpregs[CXT_V0] = 1;\
 231     uc->uc_mcontext.gpregs[CXT_A3] = 0;\
 232     _MD_RESTORE_ERRNO(_thread);        \
 233     _MD_SET_CURRENT_THREAD(_thread);   \
 234     _SETCONTEXT(uc);                   \
 235     PR_END_MACRO
 236
 237 #define _MD_SAVE_ERRNO(t)        (t)->md.errcode = errno;
 238 #define _MD_RESTORE_ERRNO(t)     errno = (t)->md.errcode;
 239
 240 #define _MD_GET_INTERVAL        _PR_UNIX_GetInterval
 241 #define _MD_INTERVAL_PER_SEC    _PR_UNIX_TicksPerSecond
 242
 243 #define _MD_EARLY_INIT          _MD_EarlyInit
 244 #define _MD_FINAL_INIT          _PR_UnixInit
 245 #define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
 246 #define _MD_INIT_THREAD         _MD_InitializeThread
 247 #define _MD_EXIT_THREAD(thread)
 248 #define _MD_SUSPEND_THREAD(thread)
 249 #define _MD_RESUME_THREAD(thread)
 250 #define _MD_CLEAN_THREAD(_thread)
 251
 252 #if !defined(S_ISSOCK) && defined(S_IFSOCK)
 253 #define S_ISSOCK(mode)   ((mode&0xF000) == 0xC000)
 254 #endif
 255 #if !defined(S_ISLNK) && defined(S_IFLNK)
 256 #define S_ISLNK(mode)   ((mode&0xA000) == 0xC000)
 257 #endif
 258
 259 #include <sys/time.h>
 260 #include <sys/types.h>
 261 #include <sys/select.h>
 262 extern int _select(int nfds, fd_set *readfds, fd_set *writefds,
 263         fd_set *execptfds, struct timeval *timeout);
 264 #define _MD_SELECT(nfds,r,w,e,tv) _select(nfds,r,w,e,tv)
 265 #define _MD_POLL _poll
 266
 267 #endif /* nspr_reliantunix_defs_h___ */