The Tor Browser: nsprpub/pr/include/md/_irix.h@44a2da4a2ab2 (annotated)

nsprpub/pr/include/md/_irix.h@44a2da4a2ab2 (annotated)

nsprpub/pr/include/md/_irix.h

Fri, 16 Jan 2015 04:50:19 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Fri, 16 Jan 2015 04:50:19 +0100
branch: TOR_BUG_9701
changeset 13: 44a2da4a2ab2
permissions: -rw-r--r--

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef nspr_irix_defs_h___
 #define nspr_irix_defs_h___
 #define _PR_HAVE_ATOMIC_CAS
 /*
  * MipsPro assembler defines _LANGUAGE_ASSEMBLY
  */
 #ifndef _LANGUAGE_ASSEMBLY
 #include "prclist.h"
 #include "prthread.h"
 #include <sys/ucontext.h>
 /*
  * Internal configuration macros
  */
 #define PR_LINKER_ARCH          "irix"
 #define _PR_SI_SYSNAME          "IRIX"
 #define _PR_SI_ARCHITECTURE     "mips"
 #define PR_DLL_SUFFIX		".so"
 #define _PR_VMBASE              0x30000000
 #define _PR_STACK_VMBASE        0x50000000
 #define _PR_NUM_GCREGS          9
 #define _MD_MMAP_FLAGS          MAP_PRIVATE
 #define _MD_DEFAULT_STACK_SIZE  65536L
 #define _MD_MIN_STACK_SIZE      16384L
 #undef  HAVE_STACK_GROWING_UP
 #define HAVE_WEAK_IO_SYMBOLS
 #define HAVE_WEAK_MALLOC_SYMBOLS
 #define HAVE_DLL
 #define USE_DLFCN
 #define _PR_HAVE_ATOMIC_OPS
 #define _PR_POLL_AVAILABLE
 #define _PR_USE_POLL
 #define _PR_STAT_HAS_ST_ATIM
 #define _PR_HAVE_OFF64_T
 #define HAVE_POINTER_LOCALTIME_R
 #define _PR_HAVE_POSIX_SEMAPHORES
 #define PR_HAVE_POSIX_NAMED_SHARED_MEMORY
 #define _PR_ACCEPT_INHERIT_NONBLOCK
 #ifdef _PR_INET6
 #define _PR_HAVE_INET_NTOP
 #define _PR_HAVE_GETIPNODEBYNAME
 #define _PR_HAVE_GETIPNODEBYADDR
 #define _PR_HAVE_GETADDRINFO
 #endif
 /* Initialization entry points */
 NSPR_API(void) _MD_EarlyInit(void);
 #define _MD_EARLY_INIT _MD_EarlyInit
 NSPR_API(void) _MD_IrixInit(void);
 #define _MD_FINAL_INIT _MD_IrixInit
 #define _MD_INIT_IO()
 /* Timer operations */
 NSPR_API(PRIntervalTime) _MD_IrixGetInterval(void);
 #define _MD_GET_INTERVAL _MD_IrixGetInterval
 NSPR_API(PRIntervalTime) _MD_IrixIntervalPerSec(void);
 #define _MD_INTERVAL_PER_SEC _MD_IrixIntervalPerSec
 /* GC operations */
 NSPR_API(void *) _MD_GetSP(PRThread *thread);
 #define    _MD_GET_SP _MD_GetSP
 /* The atomic operations */
 #include <mutex.h>
 #define _MD_INIT_ATOMIC()
 #define _MD_ATOMIC_INCREMENT(val) add_then_test((unsigned long*)val, 1)
 #define _MD_ATOMIC_ADD(ptr, val) add_then_test((unsigned long*)ptr, (unsigned long)val)
 #define _MD_ATOMIC_DECREMENT(val) add_then_test((unsigned long*)val, 0xffffffff)
 #define _MD_ATOMIC_SET(val, newval) test_and_set((unsigned long*)val, newval)
 #if defined(_PR_PTHREADS)
 #else /* defined(_PR_PTHREADS) */
 /************************************************************************/
 #include <setjmp.h>
 #include <errno.h>
 #include <unistd.h>
 #include <bstring.h>
 #include <sys/time.h>
 #include <ulocks.h>
 #include <sys/prctl.h>
 /*
  * Data region private to each sproc. This region is setup by calling
  * mmap(...,MAP_LOCAL,...). The private data is mapped at the same
  * address in every sproc, but every sproc gets a private mapping.
  *
  * Just make sure that this structure fits in a page, as only one page
  * is allocated for the private region.
  */
 struct sproc_private_data {
     struct PRThread *me;
     struct _PRCPU *cpu;
     struct PRThread *last;
     PRUintn intsOff;
 	int		sproc_pid;
 };
 extern char *_nspr_sproc_private;
 #define _PR_PRDA() ((struct sproc_private_data *) _nspr_sproc_private)
 #define _MD_SET_CURRENT_THREAD(_thread) _PR_PRDA()->me = (_thread)
 #define _MD_THIS_THREAD() (_PR_PRDA()->me)
 #define _MD_LAST_THREAD() (_PR_PRDA()->last)
 #define _MD_SET_LAST_THREAD(_thread) _PR_PRDA()->last = (_thread)
 #define _MD_CURRENT_CPU() (_PR_PRDA()->cpu)
 #define _MD_SET_CURRENT_CPU(_cpu) _PR_PRDA()->cpu = (_cpu)
 #define _MD_SET_INTSOFF(_val) (_PR_PRDA()->intsOff = _val)
 #define _MD_GET_INTSOFF() (_PR_PRDA()->intsOff)
 #define _MD_SET_SPROC_PID(_val) (_PR_PRDA()->sproc_pid = _val)
 #define _MD_GET_SPROC_PID() (_PR_PRDA()->sproc_pid)
 NSPR_API(struct PRThread*) _MD_get_attached_thread(void);
 NSPR_API(struct PRThread*) _MD_get_current_thread(void);
 #define _MD_GET_ATTACHED_THREAD()	_MD_get_attached_thread()
 #define _MD_CURRENT_THREAD()	_MD_get_current_thread()
 #define _MD_CHECK_FOR_EXIT() {					\
 		if (_pr_irix_exit_now) {				\
 			_PR_POST_SEM(_pr_irix_exit_sem);	\
 			_MD_Wakeup_CPUs();					\
 			_exit(0);							\
 		}										\
 	}
 #define _MD_ATTACH_THREAD(threadp)
 #define _MD_SAVE_ERRNO(_thread)			(_thread)->md.errcode = errno;
 #define _MD_RESTORE_ERRNO(_thread)		errno = (_thread)->md.errcode;
 extern struct _PRCPU  *_pr_primordialCPU;
 extern usema_t *_pr_irix_exit_sem;
 extern PRInt32 _pr_irix_exit_now;
 extern int _pr_irix_primoridal_cpu_fd[];
 extern PRInt32 _pr_irix_process_exit;
 extern PRInt32 _pr_irix_process_exit_code;
 /* Thread operations */
 #define _PR_LOCK_HEAP()	{						\
 			PRIntn _is;					\
 				if (_pr_primordialCPU) {		\
 				if (_MD_GET_ATTACHED_THREAD() && 		\
 					!_PR_IS_NATIVE_THREAD( 		\
 					_MD_GET_ATTACHED_THREAD()))	\
 						_PR_INTSOFF(_is); 	\
 					_PR_LOCK(_pr_heapLock);		\
 				}
 #define _PR_UNLOCK_HEAP() 	if (_pr_primordialCPU)	{		\
 					_PR_UNLOCK(_pr_heapLock);	\
 				if (_MD_GET_ATTACHED_THREAD() && 		\
 					!_PR_IS_NATIVE_THREAD( 		\
 					_MD_GET_ATTACHED_THREAD()))	\
 						_PR_INTSON(_is);	\
 				}					\
 			  }
 #define _PR_OPEN_POLL_SEM(_sem)  usopenpollsema(_sem, 0666)
 #define _PR_WAIT_SEM(_sem) uspsema(_sem)
 #define _PR_POST_SEM(_sem) usvsema(_sem)
 #define _MD_CVAR_POST_SEM(threadp)	usvsema((threadp)->md.cvar_pollsem)
 #define _MD_IOQ_LOCK()
 #define _MD_IOQ_UNLOCK()
 struct _MDLock {
     ulock_t lock;
 	usptr_t *arena;
 };
 /*
  * disable pre-emption for the LOCAL threads when calling the arena lock
  * routines
  */
 #define _PR_LOCK(lock) {						\
 		PRIntn _is;						\
 		PRThread *me = _MD_GET_ATTACHED_THREAD();			\
 		if (me && !_PR_IS_NATIVE_THREAD(me))			\
 			_PR_INTSOFF(_is); 				\
 		ussetlock(lock);					\
 		if (me && !_PR_IS_NATIVE_THREAD(me))			\
 			_PR_FAST_INTSON(_is); 				\
 	}
 #define _PR_UNLOCK(lock) {						\
 		PRIntn _is;						\
 		PRThread *me = _MD_GET_ATTACHED_THREAD();			\
 		if (me && !_PR_IS_NATIVE_THREAD(me))			\
 			_PR_INTSOFF(_is); 				\
 		usunsetlock(lock);					\
 		if (me && !_PR_IS_NATIVE_THREAD(me))			\
 			_PR_FAST_INTSON(_is); 				\
 	}
 NSPR_API(PRStatus) _MD_NEW_LOCK(struct _MDLock *md);
 NSPR_API(void) _MD_FREE_LOCK(struct _MDLock *lockp);
 #define _MD_LOCK(_lockp) _PR_LOCK((_lockp)->lock)
 #define _MD_UNLOCK(_lockp) _PR_UNLOCK((_lockp)->lock)
 #define _MD_TEST_AND_LOCK(_lockp) (uscsetlock((_lockp)->lock, 1) == 0)
 extern ulock_t _pr_heapLock;
 struct _MDThread {
     jmp_buf jb;
     usptr_t     *pollsem_arena;
     usema_t     *cvar_pollsem;
     PRInt32     cvar_pollsemfd;
     PRInt32     cvar_pollsem_select;    /* acquire sem by calling select */
     PRInt32     cvar_wait;              /* if 1, thread is waiting on cvar Q */
     PRInt32	id;
     PRInt32	suspending_id;
     int errcode;
 };
 struct _MDThreadStack {
     PRInt8 notused;
 };
 struct _MDSemaphore {
     usema_t *sem;
 };
 struct _MDCVar {
     ulock_t mdcvar_lock;
 };
 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 {
     PRInt32 id;
     PRInt32 suspending_id;
     struct _MDCPU_Unix md_unix;
 };
 /*
 ** Initialize the thread context preparing it to execute _main.
 */
 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status)	      \
     PR_BEGIN_MACRO				      \
 	int *jb = (_thread)->md.jb;		      \
     *status = PR_TRUE;              \
 	(void) setjmp(jb);			      \
 	(_thread)->md.jb[JB_SP] = (int) ((_sp) - 64); \
 	(_thread)->md.jb[JB_PC] = (int) _main;	      \
 	_thread->no_sched = 0; \
     PR_END_MACRO
 /*
 ** Switch away from the current thread context by saving its state and
 ** calling the thread scheduler. Reload cpu when we come back from the
 ** context switch because it might have changed.
 *
 *  XXX RUNQ lock needed before clearing _PR_NO_SCHED flag, because the
 *      thread may be unr RUNQ?
 */
 #define _MD_SWITCH_CONTEXT(_thread) \
     PR_BEGIN_MACRO    \
     PR_ASSERT(_thread->no_sched); \
     if (!setjmp(_thread->md.jb)) { \
         _MD_SAVE_ERRNO(_thread) \
         _MD_SET_LAST_THREAD(_thread); \
         _PR_Schedule(); \
     } else {      \
         PR_ASSERT(_MD_LAST_THREAD() !=_MD_CURRENT_THREAD()); \
             _MD_LAST_THREAD()->no_sched = 0;			\
     }             \
     PR_END_MACRO
 /*
 ** Restore a thread context that was saved by _MD_SWITCH_CONTEXT or
 ** initialized by _MD_INIT_CONTEXT.
 */
 #define _MD_RESTORE_CONTEXT(_newThread) \
     PR_BEGIN_MACRO \
     int *jb = (_newThread)->md.jb; \
     _MD_RESTORE_ERRNO(_newThread) \
     _MD_SET_CURRENT_THREAD(_newThread); \
     _newThread->no_sched = 1;		\
     longjmp(jb, 1); \
     PR_END_MACRO
 NSPR_API(PRStatus) _MD_InitThread(struct PRThread *thread,
 								PRBool wakeup_parent);
 NSPR_API(PRStatus) _MD_InitAttachedThread(struct PRThread *thread,
 									PRBool wakeup_parent);
 #define _MD_INIT_THREAD(thread) 			_MD_InitThread(thread, PR_TRUE)
 #define _MD_INIT_ATTACHED_THREAD(thread)		\
 						_MD_InitAttachedThread(thread, PR_FALSE)
 NSPR_API(void) _MD_ExitThread(struct PRThread *thread);
 #define _MD_EXIT_THREAD _MD_ExitThread
 NSPR_API(void) _MD_SuspendThread(struct PRThread *thread);
 #define _MD_SUSPEND_THREAD _MD_SuspendThread
 NSPR_API(void) _MD_ResumeThread(struct PRThread *thread);
 #define _MD_RESUME_THREAD _MD_ResumeThread
 NSPR_API(void) _MD_SuspendCPU(struct _PRCPU *thread);
 #define _MD_SUSPEND_CPU _MD_SuspendCPU
 NSPR_API(void) _MD_ResumeCPU(struct _PRCPU *thread);
 #define _MD_RESUME_CPU _MD_ResumeCPU
 #define _MD_BEGIN_SUSPEND_ALL()
 #define _MD_END_SUSPEND_ALL()
 #define _MD_BEGIN_RESUME_ALL()
 #define _MD_END_RESUME_ALL()
 NSPR_API(void) _MD_InitLocks(void);
 #define _MD_INIT_LOCKS _MD_InitLocks
 NSPR_API(void) _MD_CleanThread(struct PRThread *thread);
 #define _MD_CLEAN_THREAD _MD_CleanThread
 #define _MD_YIELD()    sginap(0)
 /* The _PR_MD_WAIT_LOCK and _PR_MD_WAKEUP_WAITER functions put to sleep and
  * awaken a thread which is waiting on a lock or cvar.
  */
 NSPR_API(PRStatus) _MD_wait(struct PRThread *, PRIntervalTime timeout);
 #define _MD_WAIT _MD_wait
 NSPR_API(void) _PR_MD_primordial_cpu();
 NSPR_API(void) _PR_MD_WAKEUP_PRIMORDIAL_CPU();
 NSPR_API(PRStatus) _MD_WakeupWaiter(struct PRThread *);
 #define _MD_WAKEUP_WAITER _MD_WakeupWaiter
 NSPR_API(void ) _MD_exit(PRIntn status);
 #define _MD_EXIT	_MD_exit
 #include "prthread.h"
 NSPR_API(void) _MD_SetPriority(struct _MDThread *thread,
 	PRThreadPriority newPri);
 #define _MD_SET_PRIORITY _MD_SetPriority
 NSPR_API(PRStatus) _MD_CreateThread(
                         struct PRThread *thread,
                         void (*start) (void *),
                         PRThreadPriority priority,
                         PRThreadScope scope,
                         PRThreadState state,
                         PRUint32 stackSize);
 #define _MD_CREATE_THREAD _MD_CreateThread
 extern void _MD_CleanupBeforeExit(void);
 #define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit
 NSPR_API(void) _PR_MD_PRE_CLEANUP(PRThread *me);
 /* The following defines the unwrapped versions of select() and poll(). */
 extern int _select(int nfds, fd_set *readfds, fd_set *writefds,
 	fd_set *exceptfds, struct timeval *timeout);
 #define _MD_SELECT	_select
 #include <stropts.h>
 #include <poll.h>
 #define _MD_POLL _poll
 extern int _poll(struct pollfd *fds, unsigned long nfds, int timeout);
 #define HAVE_THREAD_AFFINITY 1
 NSPR_API(PRInt32) _MD_GetThreadAffinityMask(PRThread *unused, PRUint32 *mask);
 #define _MD_GETTHREADAFFINITYMASK _MD_GetThreadAffinityMask
 NSPR_API(void) _MD_InitRunningCPU(struct _PRCPU *cpu);
 #define    _MD_INIT_RUNNING_CPU _MD_InitRunningCPU
 #endif  /* defined(_PR_PTHREADS) */
 #endif /* _LANGUAGE_ASSEMBLY */
 #endif /* nspr_irix_defs_h___ */

The Tor Browser / annotate

nsprpub/pr/include/md/_irix.h@44a2da4a2ab2 (annotated)

nsprpub/pr/include/md/_irix.h