Version 1.8 of gecko-sdk. Downloaded from here:...

gecko-sdk/include/md/_solaris.h

+/* -*- 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 ***** */
+
+#ifndef nspr_solaris_defs_h___
+#define nspr_solaris_defs_h___
+
+/*
+ * Internal configuration macros
+ */
+
+#define PR_LINKER_ARCH  "solaris"
+#define _PR_SI_SYSNAME  "SOLARIS"
+#ifdef sparc
+#define _PR_SI_ARCHITECTURE     "sparc"
+#elif defined(__x86_64)
+#define _PR_SI_ARCHITECTURE     "x86-64"
+#elif defined(i386)
+#define _PR_SI_ARCHITECTURE     "x86"
+#else
+#error unknown processor
+#endif
+#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_SHARED
+
+#undef  HAVE_STACK_GROWING_UP
+
+#ifndef HAVE_WEAK_IO_SYMBOLS
+#define HAVE_WEAK_IO_SYMBOLS
+#endif
+
+#undef  HAVE_WEAK_MALLOC_SYMBOLS
+#define HAVE_DLL
+#define USE_DLFCN
+#define NEED_STRFTIME_LOCK
+
+/*
+ * Intel x86 has atomic instructions.
+ *
+ * Sparc v8 does not have instructions to efficiently implement
+ * atomic increment/decrement operations.  In the local threads
+ * only and pthreads versions, we use the default atomic routine
+ * implementation in pratom.c.  The obsolete global threads only
+ * version uses a global mutex_t to implement the atomic routines
+ * in solaris.c, which is actually equivalent to the default
+ * implementation.
+ *
+ * 64-bit Solaris requires sparc v9, which has atomic instructions.
+ */
+#if defined(i386) || defined(_PR_GLOBAL_THREADS_ONLY) || defined(IS_64)
+#define _PR_HAVE_ATOMIC_OPS
+#endif
+
+#define _PR_POLL_AVAILABLE
+#define _PR_USE_POLL
+#define _PR_STAT_HAS_ST_ATIM
+#ifdef SOLARIS2_5
+#define _PR_HAVE_SYSV_SEMAPHORES
+#define PR_HAVE_SYSV_NAMED_SHARED_MEMORY
+#else
+#define _PR_HAVE_POSIX_SEMAPHORES
+#define PR_HAVE_POSIX_NAMED_SHARED_MEMORY
+#endif
+#define _PR_HAVE_GETIPNODEBYNAME
+#define _PR_HAVE_GETIPNODEBYADDR
+#define _PR_HAVE_GETADDRINFO
+#define _PR_INET6_PROBE
+#define _PR_ACCEPT_INHERIT_NONBLOCK
+#ifdef _PR_INET6
+#define _PR_HAVE_INET_NTOP
+#else
+#define AF_INET6 26
+struct addrinfo {
+    int ai_flags;
+    int ai_family;
+    int ai_socktype;
+    int ai_protocol;
+    size_t ai_addrlen;
+    char *ai_canonname;
+    struct sockaddr *ai_addr;
+    struct addrinfo *ai_next;
+};
+#define AI_CANONNAME 0x0010
+#define AI_V4MAPPED 0x0001 
+#define AI_ALL      0x0002
+#define AI_ADDRCONFIG   0x0004
+#define _PR_HAVE_MD_SOCKADDR_IN6
+/* isomorphic to struct in6_addr on Solaris 8 */
+struct _md_in6_addr {
+    union {
+        PRUint8  _S6_u8[16];
+        PRUint32 _S6_u32[4];
+        PRUint32 __S6_align;
+    } _S6_un;
+};
+/* isomorphic to struct sockaddr_in6 on Solaris 8 */
+struct _md_sockaddr_in6 {
+    PRUint16 sin6_family;
+    PRUint16 sin6_port;
+    PRUint32 sin6_flowinfo;
+    struct _md_in6_addr sin6_addr;
+    PRUint32 sin6_scope_id;
+    PRUint32 __sin6_src_id;
+};
+#endif
+#if defined(_PR_GLOBAL_THREADS_ONLY) || defined(_PR_PTHREADS)
+#define _PR_HAVE_GETHOST_R
+#define _PR_HAVE_GETHOST_R_POINTER
+#endif
+
+#include "prinrval.h"
+NSPR_API(PRIntervalTime) _MD_Solaris_GetInterval(void);
+#define _MD_GET_INTERVAL                  _MD_Solaris_GetInterval
+NSPR_API(PRIntervalTime) _MD_Solaris_TicksPerSecond(void);
+#define _MD_INTERVAL_PER_SEC              _MD_Solaris_TicksPerSecond
+
+#if defined(_PR_HAVE_ATOMIC_OPS)
+/*
+** Atomic Operations
+*/
+#define _MD_INIT_ATOMIC()
+
+NSPR_API(PRInt32) _MD_AtomicIncrement(PRInt32 *val);
+#define _MD_ATOMIC_INCREMENT _MD_AtomicIncrement
+
+NSPR_API(PRInt32) _MD_AtomicAdd(PRInt32 *ptr, PRInt32 val);
+#define _MD_ATOMIC_ADD _MD_AtomicAdd
+
+NSPR_API(PRInt32) _MD_AtomicDecrement(PRInt32 *val);
+#define _MD_ATOMIC_DECREMENT _MD_AtomicDecrement
+
+NSPR_API(PRInt32) _MD_AtomicSet(PRInt32 *val, PRInt32 newval);
+#define _MD_ATOMIC_SET _MD_AtomicSet
+#endif /* _PR_HAVE_ATOMIC_OPS */
+
+#if defined(_PR_PTHREADS)
+
+NSPR_API(void)          _MD_EarlyInit(void);
+
+#define _MD_EARLY_INIT          _MD_EarlyInit
+#define _MD_FINAL_INIT          _PR_UnixInit
+
+#elif defined(_PR_GLOBAL_THREADS_ONLY)
+
+#include "prthread.h"
+
+#include <ucontext.h>
+
+/*
+** Iinitialization Related definitions
+*/
+
+NSPR_API(void)          _MD_EarlyInit(void);
+
+#define _MD_EARLY_INIT          _MD_EarlyInit
+#define _MD_FINAL_INIT          _PR_UnixInit
+
+#define _MD_GET_SP(threadp)     threadp->md.sp
+
+/*
+** Clean-up the thread machine dependent data structure
+*/
+#define _MD_INIT_THREAD                         _MD_InitializeThread
+#define _MD_INIT_ATTACHED_THREAD        _MD_InitializeThread
+
+NSPR_API(PRStatus) _MD_CreateThread(PRThread *thread, 
+                                        void (*start)(void *), 
+                                        PRThreadPriority priority,
+                                        PRThreadScope scope, 
+                                        PRThreadState state, 
+                                        PRUint32 stackSize);
+#define _MD_CREATE_THREAD _MD_CreateThread
+
+#define _PR_CONTEXT_TYPE        ucontext_t
+
+#define CONTEXT(_thread) (&(_thread)->md.context)
+
+#include <thread.h>
+#include <sys/lwp.h>
+#include <synch.h>
+
+extern struct PRLock *_pr_schedLock;
+
+/*
+** Thread Local Storage 
+*/
+
+#define THREAD_KEY_T thread_key_t
+
+extern struct PRThread *_pr_attached_thread_tls();
+extern struct PRThread *_pr_current_thread_tls();
+extern struct _PRCPU *_pr_current_cpu_tls();
+extern struct PRThread *_pr_last_thread_tls();
+
+extern THREAD_KEY_T threadid_key;
+extern THREAD_KEY_T cpuid_key;
+extern THREAD_KEY_T last_thread_key;
+
+#define _MD_GET_ATTACHED_THREAD() _pr_attached_thread_tls()
+#define _MD_CURRENT_THREAD() _pr_current_thread_tls()
+#define _MD_CURRENT_CPU() _pr_current_cpu_tls()
+#define _MD_LAST_THREAD() _pr_last_thread_tls()
+        
+#define _MD_SET_CURRENT_THREAD(newval)                  \
+        PR_BEGIN_MACRO                                  \
+        thr_setspecific(threadid_key, (void *)newval);  \
+        PR_END_MACRO
+
+#define _MD_SET_CURRENT_CPU(newval)                     \
+        PR_BEGIN_MACRO                                  \
+        thr_setspecific(cpuid_key, (void *)newval);     \
+        PR_END_MACRO
+
+#define _MD_SET_LAST_THREAD(newval)                             \
+        PR_BEGIN_MACRO                                          \
+        thr_setspecific(last_thread_key, (void *)newval);       \
+        PR_END_MACRO
+        
+#define _MD_CLEAN_THREAD(_thread)       _MD_cleanup_thread(_thread)
+extern void _MD_exit_thread(PRThread *thread);
+#define _MD_EXIT_THREAD(thread)         _MD_exit_thread(thread)
+
+#define _MD_SUSPEND_THREAD(thread)      _MD_Suspend(thread)
+#define _MD_RESUME_THREAD(thread)       thr_continue((thread)->md.handle)
+
+/* XXXX Needs to be defined - Prashant */
+#define _MD_SUSPEND_CPU(cpu)
+#define _MD_RESUME_CPU(cpu)
+
+extern void _MD_Begin_SuspendAll(void);
+extern void _MD_End_SuspendAll(void);
+extern void _MD_End_ResumeAll(void);
+#define _MD_BEGIN_SUSPEND_ALL()         _MD_Begin_SuspendAll()
+#define _MD_BEGIN_RESUME_ALL()          
+#define _MD_END_SUSPEND_ALL()           _MD_End_SuspendAll()
+#define _MD_END_RESUME_ALL()            _MD_End_ResumeAll()
+
+#define _MD_INIT_LOCKS()
+#define _MD_NEW_LOCK(md_lockp) (mutex_init(&((md_lockp)->lock),USYNC_THREAD,NULL) ? PR_FAILURE : PR_SUCCESS)
+#define _MD_FREE_LOCK(md_lockp) mutex_destroy(&((md_lockp)->lock))
+#define _MD_UNLOCK(md_lockp) mutex_unlock(&((md_lockp)->lock))
+#define _MD_TEST_AND_LOCK(md_lockp) mutex_trylock(&((md_lockp)->lock))
+struct _MDLock;
+NSPR_API(void) _MD_lock(struct _MDLock *md_lock);
+#undef PROFILE_LOCKS
+#ifndef PROFILE_LOCKS
+#define _MD_LOCK(md_lockp) _MD_lock(md_lockp)
+#else
+#define _MD_LOCK(md_lockp)                 \
+    PR_BEGIN_MACRO \
+    int rv = _MD_TEST_AND_LOCK(md_lockp); \
+    if (rv == 0) { \
+        (md_lockp)->hitcount++; \
+    } else { \
+        (md_lockp)->misscount++; \
+        _MD_lock(md_lockp); \
+    } \
+    PR_END_MACRO
+#endif
+
+#define _PR_LOCK_HEAP() if (_pr_heapLock) _MD_LOCK(&_pr_heapLock->md)
+#define _PR_UNLOCK_HEAP() if (_pr_heapLock) _MD_UNLOCK(&_pr_heapLock->md)
+
+#define _MD_ATTACH_THREAD(threadp)
+
+
+#define THR_KEYCREATE thr_keycreate
+#define THR_SELF thr_self
+#define _MD_NEW_CV(condp) cond_init(&((condp)->cv), USYNC_THREAD, 0)
+#define COND_WAIT(condp, mutexp) cond_wait(condp, mutexp)
+#define COND_TIMEDWAIT(condp, mutexp, tspec) \
+                                     cond_timedwait(condp, mutexp, tspec)
+#define _MD_NOTIFY_CV(condp, lockp) cond_signal(&((condp)->cv))
+#define _MD_NOTIFYALL_CV(condp,unused) cond_broadcast(&((condp)->cv))   
+#define _MD_FREE_CV(condp) cond_destroy(&((condp)->cv))
+#define _MD_YIELD() thr_yield()
+#include <time.h>
+/* 
+ * Because clock_gettime() on Solaris/x86 2.4 always generates a
+ * segmentation fault, we use an emulated version _pr_solx86_clock_gettime(),
+ * which is implemented using gettimeofday().
+ */
+#if defined(i386) && defined(SOLARIS2_4)
+extern int _pr_solx86_clock_gettime(clockid_t clock_id, struct timespec *tp);
+#define GETTIME(tt) _pr_solx86_clock_gettime(CLOCK_REALTIME, (tt))
+#else
+#define GETTIME(tt) clock_gettime(CLOCK_REALTIME, (tt))
+#endif  /* i386 && SOLARIS2_4 */
+
+#define MUTEX_T mutex_t
+#define COND_T cond_t
+
+#define _MD_NEW_SEM(md_semp,_val)  sema_init(&((md_semp)->sem),_val,USYNC_THREAD,NULL)
+#define _MD_DESTROY_SEM(md_semp) sema_destroy(&((md_semp)->sem))
+#define _MD_WAIT_SEM(md_semp) sema_wait(&((md_semp)->sem))
+#define _MD_POST_SEM(md_semp) sema_post(&((md_semp)->sem))
+
+#define _MD_SAVE_ERRNO(_thread)
+#define _MD_RESTORE_ERRNO(_thread)
+#define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
+
+extern struct _MDLock _pr_ioq_lock;
+#define _MD_IOQ_LOCK()          _MD_LOCK(&_pr_ioq_lock)
+#define _MD_IOQ_UNLOCK()        _MD_UNLOCK(&_pr_ioq_lock)
+
+extern PRStatus _MD_wait(struct PRThread *, PRIntervalTime timeout);
+#define _MD_WAIT _MD_wait
+
+extern PRStatus _MD_WakeupWaiter(struct PRThread *);
+#define _MD_WAKEUP_WAITER _MD_WakeupWaiter
+
+NSPR_API(void) _MD_InitIO(void);
+#define _MD_INIT_IO _MD_InitIO
+
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
+    PR_BEGIN_MACRO \
+    *status = PR_TRUE; \
+    PR_END_MACRO
+#define _MD_SWITCH_CONTEXT(_thread)
+#define _MD_RESTORE_CONTEXT(_newThread)
+
+struct _MDLock {
+    MUTEX_T lock;
+#ifdef PROFILE_LOCKS
+    PRInt32 hitcount;
+    PRInt32 misscount;
+#endif
+};
+
+struct _MDCVar {
+    COND_T cv;
+};
+
+struct _MDSemaphore {
+    sema_t sem;
+};
+
+struct _MDThread {
+    _PR_CONTEXT_TYPE context;
+    thread_t handle;
+    lwpid_t lwpid;
+    uint_t sp;          /* stack pointer */
+    uint_t threadID;    /* ptr to solaris-internal thread id structures */
+    struct _MDSemaphore waiter_sem;
+};
+
+struct _MDThreadStack {
+    PRInt8 notused;
+};
+
+struct _MDSegment {
+    PRInt8 notused;
+};
+
+/*
+ * md-specific cpu structure field, common to all Unix platforms
+ */
+#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;
+};
+
+/* 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 <poll.h>
+#define _MD_POLL _poll
+extern int _poll(struct pollfd *fds, unsigned long nfds, int timeout);
+
+PR_BEGIN_EXTERN_C
+
+/*
+** Missing function prototypes
+*/
+extern int gethostname (char *name, int namelen);
+
+PR_END_EXTERN_C
+
+#else /* _PR_GLOBAL_THREADS_ONLY */
+
+/*
+ * LOCAL_THREADS_ONLY implementation on Solaris
+ */
+
+#include "prthread.h"
+
+#include <errno.h>
+#include <ucontext.h>
+#include <sys/stack.h>
+#include <synch.h>
+
+/*
+** Iinitialization Related definitions
+*/
+
+NSPR_API(void)                          _MD_EarlyInit(void);
+NSPR_API(void)                          _MD_SolarisInit();
+#define _MD_EARLY_INIT          _MD_EarlyInit
+#define _MD_FINAL_INIT          _MD_SolarisInit
+#define _MD_INIT_THREAD         _MD_InitializeThread
+
+#ifdef USE_SETJMP
+
+#include <setjmp.h>
+
+#define _PR_CONTEXT_TYPE        jmp_buf
+
+#ifdef sparc
+#define _MD_GET_SP(_t)          (_t)->md.context[2]
+#else
+#define _MD_GET_SP(_t)          (_t)->md.context[4]
+#endif
+
+#define PR_NUM_GCREGS           _JBLEN
+#define CONTEXT(_thread)        (_thread)->md.context
+
+#else  /* ! USE_SETJMP */
+
+#ifdef sparc
+#define _PR_CONTEXT_TYPE        ucontext_t
+#define _MD_GET_SP(_t)          (_t)->md.context.uc_mcontext.gregs[REG_SP]
+/*
+** Sparc's use register windows. the _MD_GetRegisters for the sparc's
+** doesn't actually store anything into the argument buffer; instead the
+** register windows are homed to the stack. I assume that the stack
+** always has room for the registers to spill to...
+*/
+#define PR_NUM_GCREGS           0
+#else
+#define _PR_CONTEXT_TYPE        unsigned int edi; sigset_t oldMask, blockMask; ucontext_t
+#define _MD_GET_SP(_t)          (_t)->md.context.uc_mcontext.gregs[USP]
+#define PR_NUM_GCREGS           _JBLEN
+#endif
+
+#define CONTEXT(_thread)        (&(_thread)->md.context)
+
+#endif /* ! USE_SETJMP */
+
+#include <time.h>
+/* 
+ * Because clock_gettime() on Solaris/x86 always generates a
+ * segmentation fault, we use an emulated version _pr_solx86_clock_gettime(),
+ * which is implemented using gettimeofday().
+ */
+#ifdef i386
+#define GETTIME(tt) _pr_solx86_clock_gettime(CLOCK_REALTIME, (tt))
+#else
+#define GETTIME(tt) clock_gettime(CLOCK_REALTIME, (tt))
+#endif  /* i386 */
+
+#define _MD_SAVE_ERRNO(_thread)                 (_thread)->md.errcode = errno;
+#define _MD_RESTORE_ERRNO(_thread)              errno = (_thread)->md.errcode;
+
+#ifdef sparc
+
+#ifdef USE_SETJMP
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status)         \
+    PR_BEGIN_MACRO                                    \
+        int *context = (_thread)->md.context;         \
+    *status = PR_TRUE;              \
+        (void) setjmp(context);                       \
+        (_thread)->md.context[1] = (int) ((_sp) - 64); \
+        (_thread)->md.context[2] = (int) _main;       \
+        (_thread)->md.context[3] = (int) _main + 4; \
+    _thread->no_sched = 0; \
+    PR_END_MACRO
+
+#define _MD_SWITCH_CONTEXT(_thread)    \
+    if (!setjmp(CONTEXT(_thread))) { \
+        _MD_SAVE_ERRNO(_thread)    \
+        _MD_SET_LAST_THREAD(_thread);    \
+    _MD_SET_CURRENT_THREAD(_thread);     \
+        _PR_Schedule();              \
+    }
+
+#define _MD_RESTORE_CONTEXT(_newThread)     \
+{                                    \
+        _MD_RESTORE_ERRNO(_newThread)       \
+        _MD_SET_CURRENT_THREAD(_newThread); \
+    longjmp(CONTEXT(_newThread), 1);    \
+}
+
+#else
+/*
+** Initialize the thread context preparing it to execute _main.
+*/
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status)                                   \
+    PR_BEGIN_MACRO                                                                                                      \
+    ucontext_t *uc = CONTEXT(_thread);                                                                  \
+    *status = PR_TRUE;                                                                                                  \
+    getcontext(uc);                                                                                                             \
+    uc->uc_stack.ss_sp = (char *) ((unsigned long)(_sp - WINDOWSIZE - SA(MINFRAME)) & 0xfffffff8);      \
+    uc->uc_stack.ss_size = _thread->stack->stackSize;                                   \
+    uc->uc_stack.ss_flags = 0;                          /* ? */                                 \
+    uc->uc_mcontext.gregs[REG_SP] = (unsigned int) uc->uc_stack.ss_sp;  \
+    uc->uc_mcontext.gregs[REG_PC] = (unsigned int) _main;                               \
+    uc->uc_mcontext.gregs[REG_nPC] = (unsigned int) ((char*)_main)+4;   \
+    uc->uc_flags = UC_ALL;                                                                                              \
+    _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.
+*/
+#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 that was saved by _MD_SWITCH_CONTEXT or
+** initialized by _MD_INIT_CONTEXT.
+*/
+#define _MD_RESTORE_CONTEXT(_newThread)                                 \
+    PR_BEGIN_MACRO                                                                              \
+        ucontext_t *uc = CONTEXT(_newThread);                           \
+        uc->uc_mcontext.gregs[11] = 1;                                          \
+                _MD_RESTORE_ERRNO(_newThread);                                  \
+                _MD_SET_CURRENT_THREAD(_newThread);                             \
+        setcontext(uc);                                                                 \
+    PR_END_MACRO
+#endif
+
+#else  /* x86 solaris */
+
+#ifdef USE_SETJMP
+
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
+    PR_BEGIN_MACRO \
+    *status = PR_TRUE; \
+    if (setjmp(CONTEXT(_thread))) _main(); \
+    _MD_GET_SP(_thread) = (int) ((_sp) - 64); \
+    PR_END_MACRO
+
+#define _MD_SWITCH_CONTEXT(_thread) \
+    if (!setjmp(CONTEXT(_thread))) { \
+        _MD_SAVE_ERRNO(_thread) \
+        _PR_Schedule(); \
+    }
+
+#define _MD_RESTORE_CONTEXT(_newThread) \
+{ \
+    _MD_RESTORE_ERRNO(_newThread) \
+    _MD_SET_CURRENT_THREAD(_newThread); \
+    longjmp(CONTEXT(_newThread), 1); \
+}
+
+#else /* USE_SETJMP */
+
+#define WINDOWSIZE              0
+ 
+int getedi(void);
+void setedi(int);
+ 
+#define _MD_INIT_CONTEXT(_thread, _sp, _main, status)         \
+        PR_BEGIN_MACRO                                  \
+        ucontext_t *uc = CONTEXT(_thread);              \
+        *status = PR_TRUE;              \
+        getcontext(uc);                                 \
+        /* Force sp to be double aligned! */            \
+        uc->uc_mcontext.gregs[USP] = (int) ((unsigned long)(_sp - WINDOWSIZE - SA(MINFRAME)) & 0xfffffff8);     \
+        uc->uc_mcontext.gregs[PC] = (int) _main;        \
+        (_thread)->no_sched = 0; \
+        PR_END_MACRO
+
+/* getcontext() may return 1, contrary to what the man page says */
+#define _MD_SWITCH_CONTEXT(_thread)                     \
+        PR_BEGIN_MACRO                                  \
+        ucontext_t *uc = CONTEXT(_thread);              \
+        PR_ASSERT(_thread->no_sched);                   \
+        sigfillset(&((_thread)->md.blockMask));         \
+        sigprocmask(SIG_BLOCK, &((_thread)->md.blockMask),      \
+                &((_thread)->md.oldMask));              \
+        (_thread)->md.edi = getedi();                   \
+        if (! getcontext(uc)) {                         \
+                sigprocmask(SIG_SETMASK, &((_thread)->md.oldMask), NULL); \
+                uc->uc_mcontext.gregs[EDI] = (_thread)->md.edi; \
+                _MD_SAVE_ERRNO(_thread)                 \
+                _MD_SET_LAST_THREAD(_thread);           \
+                _PR_Schedule();                         \
+        } else {                                        \
+                sigprocmask(SIG_SETMASK, &((_thread)->md.oldMask), NULL); \
+                setedi((_thread)->md.edi);              \
+                PR_ASSERT(_MD_LAST_THREAD() !=_MD_CURRENT_THREAD()); \
+                _MD_LAST_THREAD()->no_sched = 0;        \
+        }                                               \
+        PR_END_MACRO
+
+/*
+** Restore a thread context, saved by _PR_SWITCH_CONTEXT
+*/
+#define _MD_RESTORE_CONTEXT(_newthread)                 \
+        PR_BEGIN_MACRO                                  \
+        ucontext_t *uc = CONTEXT(_newthread);           \
+        uc->uc_mcontext.gregs[EAX] = 1;                 \
+        _MD_RESTORE_ERRNO(_newthread)                   \
+        _MD_SET_CURRENT_THREAD(_newthread);             \
+        (_newthread)->no_sched = 1;                     \
+        setcontext(uc);                                 \
+        PR_END_MACRO
+#endif /* USE_SETJMP */
+
+#endif /* sparc */
+
+struct _MDLock {
+        PRInt8 notused;
+};
+
+struct _MDCVar {
+        PRInt8 notused;
+};
+
+struct _MDSemaphore {
+        PRInt8 notused;
+};
+
+struct _MDThread {
+    _PR_CONTEXT_TYPE context;
+    int errcode;
+    int id;
+};
+
+struct _MDThreadStack {
+    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;
+};
+
+#ifndef _PR_PTHREADS
+#define _MD_INIT_LOCKS()
+#endif
+#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()
+
+#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)
+
+extern PRStatus _MD_WAIT(struct PRThread *, PRIntervalTime timeout);
+extern PRStatus _MD_WAKEUP_WAITER(struct PRThread *);
+extern void     _MD_YIELD(void);
+extern PRStatus _MD_InitializeThread(PRThread *thread);
+extern void     _MD_SET_PRIORITY(struct _MDThread *thread,
+        PRThreadPriority newPri);
+extern PRStatus _MD_CREATE_THREAD(PRThread *thread, void (*start) (void *),
+        PRThreadPriority priority, PRThreadScope scope, PRThreadState state,
+        PRUint32 stackSize);
+
+NSPR_API(PRIntervalTime)                                _MD_Solaris_GetInterval(void);
+#define _MD_GET_INTERVAL                                _MD_Solaris_GetInterval
+NSPR_API(PRIntervalTime)                                _MD_Solaris_TicksPerSecond(void);
+#define _MD_INTERVAL_PER_SEC                    _MD_Solaris_TicksPerSecond
+
+/* 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);
+
+PR_BEGIN_EXTERN_C
+
+/*
+** Missing function prototypes
+*/
+extern int gethostname (char *name, int namelen);
+
+PR_END_EXTERN_C
+
+#endif /* _PR_GLOBAL_THREADS_ONLY */
+
+extern void _MD_solaris_map_sendfile_error(int err);
+
+#endif /* nspr_solaris_defs_h___ */
+