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212 lines
6.4 KiB
C
212 lines
6.4 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* reliantunix.h
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* 5/18/96 Taken from nec.h -- chrisk@netscape.com
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* 3/14/97 Modified for nspr20 -- chrisk@netscape.com
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*/
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#ifndef nspr_reliantunix_defs_h___
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#define nspr_reliantunix_defs_h___
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/*
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* Internal configuration macros
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*/
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#define PR_LINKER_ARCH "sinix"
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#define _PR_SI_SYSNAME "SINIX"
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#define _PR_SI_ARCHITECTURE "mips"
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#define PR_DLL_SUFFIX ".so"
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#define _PR_VMBASE 0x30000000
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#define _PR_STACK_VMBASE 0x50000000
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#define _MD_DEFAULT_STACK_SIZE (2*65536L)
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#define _MD_MMAP_FLAGS MAP_PRIVATE|MAP_FIXED
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#undef HAVE_STACK_GROWING_UP
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#define HAVE_DLL
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#define USE_DLFCN
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#define NEED_STRFTIME_LOCK
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#define NEED_TIME_R
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#define HAVE_NETCONFIG
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#define HAVE_WEAK_IO_SYMBOLS
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#define HAVE_WEAK_MALLOC_SYMBOLS
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#define _PR_RECV_BROKEN /* recv doesn't work on Unix Domain Sockets */
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/*
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* Mike Patnode indicated that it is possibly safe now to use context-switching
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* calls that do not change the signal mask, like setjmp vs. sigsetjmp.
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* So we'll use our homegrown, getcontext/setcontext-compatible stuff which
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* will save us the getcontext/setcontext system calls at each context switch.
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* It already works in FastTrack 2.01, so it should do it here :-)
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* - chrisk 040497
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*/
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#define USE_SETCXT /* temporarily disabled... */
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#include <ucontext.h>
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#ifdef USE_SETCXT
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/* use non-syscall machine language replacement */
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#define _GETCONTEXT getcxt
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#define _SETCONTEXT setcxt
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/* defined in os_ReliantUNIX.s */
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extern int getcxt(ucontext_t *);
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extern int setcxt(ucontext_t *);
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#else
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#define _GETCONTEXT getcontext
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#define _SETCONTEXT setcontext
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#endif
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#define _MD_GET_SP(_t) (_t)->md.context.uc_mcontext.gpregs[CXT_SP]
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#define _PR_CONTEXT_TYPE ucontext_t
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#define _PR_NUM_GCREGS NGREG
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#define CONTEXT(_thread) (&(_thread)->md.context)
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#define _PR_IS_NATIVE_THREAD_SUPPORTED() 0
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/*
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** Machine-dependent (MD) data structures.
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*/
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struct _MDThread {
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_PR_CONTEXT_TYPE context;
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int id;
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int errcode;
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};
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struct _MDThreadStack {
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PRInt8 notused;
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};
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struct _MDLock {
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PRInt8 notused;
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};
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struct _MDSemaphore {
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PRInt8 notused;
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};
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struct _MDCVar {
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PRInt8 notused;
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};
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struct _MDSegment {
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PRInt8 notused;
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};
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struct _MDCPU {
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struct _MDCPU_Unix md_unix;
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};
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#define _MD_INIT_LOCKS()
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#define _MD_NEW_LOCK(lock) PR_SUCCESS
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#define _MD_FREE_LOCK(lock)
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#define _MD_LOCK(lock)
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#define _MD_UNLOCK(lock)
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#define _MD_INIT_IO()
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#define _MD_IOQ_LOCK()
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#define _MD_IOQ_UNLOCK()
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/*
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** Initialize the thread context preparing it to execute "_main()"
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** - get a nice, fresh context
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** - set its SP to the stack we allcoated for it
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** - set it to start things at "e"
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*/
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#define _MD_INIT_CONTEXT(thread, _sp, _main, status) \
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PR_BEGIN_MACRO \
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*status = PR_TRUE; \
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_GETCONTEXT(CONTEXT(thread)); \
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/* this is supposed to point to the stack BASE, not to SP */ \
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CONTEXT(thread)->uc_stack.ss_sp = thread->stack->stackBottom; \
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CONTEXT(thread)->uc_stack.ss_size = thread->stack->stackSize; \
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CONTEXT(thread)->uc_mcontext.gpregs[CXT_SP] = ((unsigned long)_sp - 128) & 0xfffffff8; \
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CONTEXT(thread)->uc_mcontext.gpregs[CXT_T9] = _main; \
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CONTEXT(thread)->uc_mcontext.gpregs[CXT_EPC] = _main; \
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CONTEXT(thread)->uc_mcontext.gpregs[CXT_RA] = 0; \
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thread->no_sched = 0; \
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PR_END_MACRO
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/*
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** Save current context as it is scheduled away
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*/
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#define _MD_SWITCH_CONTEXT(_thread) \
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PR_BEGIN_MACRO \
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if (!_GETCONTEXT(CONTEXT(_thread))) { \
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_MD_SAVE_ERRNO(_thread); \
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_MD_SET_LAST_THREAD(_thread); \
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_PR_Schedule(); \
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} \
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PR_END_MACRO
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/*
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** Restore a thread context, saved by _MD_SWITCH_CONTEXT or set up
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** by _MD_INIT_CONTEXT
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** CXT_V0 is the register that holds the return value.
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** We must set it to 1 so that we can see if the return from
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** getcontext() is the result of calling getcontext() or
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** setcontext()...
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** setting a context got with getcontext() appears to
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** return from getcontext(), too!
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** CXT_A3 is the register that holds status when returning
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** from a syscall. It is set to 0 to indicate success,
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** because we want getcontext() on the other side of the magic
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** door to be ok.
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*/
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#define _MD_RESTORE_CONTEXT(_thread) \
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PR_BEGIN_MACRO \
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ucontext_t *uc = CONTEXT(_thread); \
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uc->uc_mcontext.gpregs[CXT_V0] = 1;\
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uc->uc_mcontext.gpregs[CXT_A3] = 0;\
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_MD_RESTORE_ERRNO(_thread); \
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_MD_SET_CURRENT_THREAD(_thread); \
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_SETCONTEXT(uc); \
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PR_END_MACRO
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#define _MD_SAVE_ERRNO(t) (t)->md.errcode = errno;
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#define _MD_RESTORE_ERRNO(t) errno = (t)->md.errcode;
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#define _MD_GET_INTERVAL _PR_UNIX_GetInterval
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#define _MD_INTERVAL_PER_SEC _PR_UNIX_TicksPerSecond
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#define _MD_EARLY_INIT _MD_EarlyInit
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#define _MD_FINAL_INIT _PR_UnixInit
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#define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
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#define _MD_INIT_THREAD _MD_InitializeThread
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#define _MD_EXIT_THREAD(thread)
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#define _MD_SUSPEND_THREAD(thread)
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#define _MD_RESUME_THREAD(thread)
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#define _MD_CLEAN_THREAD(_thread)
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#if !defined(S_ISSOCK) && defined(S_IFSOCK)
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#define S_ISSOCK(mode) ((mode&0xF000) == 0xC000)
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#endif
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#if !defined(S_ISLNK) && defined(S_IFLNK)
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#define S_ISLNK(mode) ((mode&0xA000) == 0xC000)
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#endif
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/select.h>
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extern int _select(int nfds, fd_set *readfds, fd_set *writefds,
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fd_set *execptfds, struct timeval *timeout);
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#define _MD_SELECT(nfds,r,w,e,tv) _select(nfds,r,w,e,tv)
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#define _MD_POLL _poll
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#endif /* nspr_reliantunix_defs_h___ */
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