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gecko/nsprpub/pr/include/md/_reliantunix.h
Benjamin Smedberg 3f46fcee93 Import NSPR 4_7_1_RTM
2008-06-06 08:36:51 -04:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* reliantunix.h
* 5/18/96 Taken from nec.h -- chrisk@netscape.com
* 3/14/97 Modified for nspr20 -- chrisk@netscape.com
*/
#ifndef nspr_reliantunix_defs_h___
#define nspr_reliantunix_defs_h___
/*
* Internal configuration macros
*/
#define PR_LINKER_ARCH "sinix"
#define _PR_SI_SYSNAME "SINIX"
#define _PR_SI_ARCHITECTURE "mips"
#define PR_DLL_SUFFIX ".so"
#define _PR_VMBASE 0x30000000
#define _PR_STACK_VMBASE 0x50000000
#define _MD_DEFAULT_STACK_SIZE (2*65536L)
#define _MD_MMAP_FLAGS MAP_PRIVATE|MAP_FIXED
#undef HAVE_STACK_GROWING_UP
#define HAVE_DLL
#define USE_DLFCN
#define NEED_STRFTIME_LOCK
#define NEED_TIME_R
#define HAVE_NETCONFIG
#define HAVE_WEAK_IO_SYMBOLS
#define HAVE_WEAK_MALLOC_SYMBOLS
#define _PR_RECV_BROKEN /* recv doesn't work on Unix Domain Sockets */
#define _PR_POLL_AVAILABLE
#define _PR_USE_POLL
#define _PR_STAT_HAS_ST_ATIM
#define _PR_NO_LARGE_FILES
/*
* Mike Patnode indicated that it is possibly safe now to use context-switching
* calls that do not change the signal mask, like setjmp vs. sigsetjmp.
* So we'll use our homegrown, getcontext/setcontext-compatible stuff which
* will save us the getcontext/setcontext system calls at each context switch.
* It already works in FastTrack 2.01, so it should do it here :-)
* - chrisk 040497
*/
#define USE_SETCXT /* temporarily disabled... */
#include <ucontext.h>
#ifdef USE_SETCXT
/* use non-syscall machine language replacement */
#define _GETCONTEXT getcxt
#define _SETCONTEXT setcxt
/* defined in os_ReliantUNIX.s */
extern int getcxt(ucontext_t *);
extern int setcxt(ucontext_t *);
#else
#define _GETCONTEXT getcontext
#define _SETCONTEXT setcontext
#endif
#define _MD_GET_SP(_t) (_t)->md.context.uc_mcontext.gpregs[CXT_SP]
#define _PR_CONTEXT_TYPE ucontext_t
#define _PR_NUM_GCREGS NGREG
#define CONTEXT(_thread) (&(_thread)->md.context)
#define _PR_IS_NATIVE_THREAD_SUPPORTED() 0
/*
** Machine-dependent (MD) data structures.
*/
struct _MDThread {
_PR_CONTEXT_TYPE context;
int id;
int errcode;
};
struct _MDThreadStack {
PRInt8 notused;
};
struct _MDLock {
PRInt8 notused;
};
struct _MDSemaphore {
PRInt8 notused;
};
struct _MDCVar {
PRInt8 notused;
};
struct _MDSegment {
PRInt8 notused;
};
/*
* md-specific cpu structure field
*/
#define _PR_MD_MAX_OSFD FD_SETSIZE
struct _MDCPU_Unix {
PRCList ioQ;
PRUint32 ioq_timeout;
PRInt32 ioq_max_osfd;
PRInt32 ioq_osfd_cnt;
#ifndef _PR_USE_POLL
fd_set fd_read_set, fd_write_set, fd_exception_set;
PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
fd_exception_cnt[_PR_MD_MAX_OSFD];
#else
struct pollfd *ioq_pollfds;
int ioq_pollfds_size;
#endif /* _PR_USE_POLL */
};
#define _PR_IOQ(_cpu) ((_cpu)->md.md_unix.ioQ)
#define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
#define _PR_FD_READ_SET(_cpu) ((_cpu)->md.md_unix.fd_read_set)
#define _PR_FD_READ_CNT(_cpu) ((_cpu)->md.md_unix.fd_read_cnt)
#define _PR_FD_WRITE_SET(_cpu) ((_cpu)->md.md_unix.fd_write_set)
#define _PR_FD_WRITE_CNT(_cpu) ((_cpu)->md.md_unix.fd_write_cnt)
#define _PR_FD_EXCEPTION_SET(_cpu) ((_cpu)->md.md_unix.fd_exception_set)
#define _PR_FD_EXCEPTION_CNT(_cpu) ((_cpu)->md.md_unix.fd_exception_cnt)
#define _PR_IOQ_TIMEOUT(_cpu) ((_cpu)->md.md_unix.ioq_timeout)
#define _PR_IOQ_MAX_OSFD(_cpu) ((_cpu)->md.md_unix.ioq_max_osfd)
#define _PR_IOQ_OSFD_CNT(_cpu) ((_cpu)->md.md_unix.ioq_osfd_cnt)
#define _PR_IOQ_POLLFDS(_cpu) ((_cpu)->md.md_unix.ioq_pollfds)
#define _PR_IOQ_POLLFDS_SIZE(_cpu) ((_cpu)->md.md_unix.ioq_pollfds_size)
#define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu) 32
struct _MDCPU {
struct _MDCPU_Unix md_unix;
};
#define _MD_INIT_LOCKS()
#define _MD_NEW_LOCK(lock) PR_SUCCESS
#define _MD_FREE_LOCK(lock)
#define _MD_LOCK(lock)
#define _MD_UNLOCK(lock)
#define _MD_INIT_IO()
#define _MD_IOQ_LOCK()
#define _MD_IOQ_UNLOCK()
/*
** Initialize the thread context preparing it to execute "_main()"
** - get a nice, fresh context
** - set its SP to the stack we allcoated for it
** - set it to start things at "e"
*/
#define _MD_INIT_CONTEXT(thread, _sp, _main, status) \
PR_BEGIN_MACRO \
*status = PR_TRUE; \
_GETCONTEXT(CONTEXT(thread)); \
/* this is supposed to point to the stack BASE, not to SP */ \
CONTEXT(thread)->uc_stack.ss_sp = thread->stack->stackBottom; \
CONTEXT(thread)->uc_stack.ss_size = thread->stack->stackSize; \
CONTEXT(thread)->uc_mcontext.gpregs[CXT_SP] = ((unsigned long)_sp - 128) & 0xfffffff8; \
CONTEXT(thread)->uc_mcontext.gpregs[CXT_T9] = _main; \
CONTEXT(thread)->uc_mcontext.gpregs[CXT_EPC] = _main; \
CONTEXT(thread)->uc_mcontext.gpregs[CXT_RA] = 0; \
thread->no_sched = 0; \
PR_END_MACRO
/*
** Save current context as it is scheduled away
*/
#define _MD_SWITCH_CONTEXT(_thread) \
PR_BEGIN_MACRO \
if (!_GETCONTEXT(CONTEXT(_thread))) { \
_MD_SAVE_ERRNO(_thread); \
_MD_SET_LAST_THREAD(_thread); \
_PR_Schedule(); \
} \
PR_END_MACRO
/*
** Restore a thread context, saved by _MD_SWITCH_CONTEXT or set up
** by _MD_INIT_CONTEXT
** CXT_V0 is the register that holds the return value.
** We must set it to 1 so that we can see if the return from
** getcontext() is the result of calling getcontext() or
** setcontext()...
** setting a context got with getcontext() appears to
** return from getcontext(), too!
** CXT_A3 is the register that holds status when returning
** from a syscall. It is set to 0 to indicate success,
** because we want getcontext() on the other side of the magic
** door to be ok.
*/
#define _MD_RESTORE_CONTEXT(_thread) \
PR_BEGIN_MACRO \
ucontext_t *uc = CONTEXT(_thread); \
uc->uc_mcontext.gpregs[CXT_V0] = 1;\
uc->uc_mcontext.gpregs[CXT_A3] = 0;\
_MD_RESTORE_ERRNO(_thread); \
_MD_SET_CURRENT_THREAD(_thread); \
_SETCONTEXT(uc); \
PR_END_MACRO
#define _MD_SAVE_ERRNO(t) (t)->md.errcode = errno;
#define _MD_RESTORE_ERRNO(t) errno = (t)->md.errcode;
#define _MD_GET_INTERVAL _PR_UNIX_GetInterval
#define _MD_INTERVAL_PER_SEC _PR_UNIX_TicksPerSecond
#define _MD_EARLY_INIT _MD_EarlyInit
#define _MD_FINAL_INIT _PR_UnixInit
#define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
#define _MD_INIT_THREAD _MD_InitializeThread
#define _MD_EXIT_THREAD(thread)
#define _MD_SUSPEND_THREAD(thread)
#define _MD_RESUME_THREAD(thread)
#define _MD_CLEAN_THREAD(_thread)
#if !defined(S_ISSOCK) && defined(S_IFSOCK)
#define S_ISSOCK(mode) ((mode&0xF000) == 0xC000)
#endif
#if !defined(S_ISLNK) && defined(S_IFLNK)
#define S_ISLNK(mode) ((mode&0xA000) == 0xC000)
#endif
#include <sys/time.h>
#include <sys/types.h>
#include <sys/select.h>
extern int _select(int nfds, fd_set *readfds, fd_set *writefds,
fd_set *execptfds, struct timeval *timeout);
#define _MD_SELECT(nfds,r,w,e,tv) _select(nfds,r,w,e,tv)
#define _MD_POLL _poll
#endif /* nspr_reliantunix_defs_h___ */
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