240 lines
5.9 KiB
C
240 lines
5.9 KiB
C
/*
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* System-dependent scheduler support
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*
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* Copyright 1998 Alexandre Julliard
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*/
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#include "config.h"
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/* Get pointers to the static errno and h_errno variables used by Xlib. This
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must be done before including <errno.h> makes the variables invisible. */
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extern int errno;
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static int *perrno = &errno;
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extern int h_errno;
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static int *ph_errno = &h_errno;
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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#endif
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#ifdef HAVE_SYS_LWP_H
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# include <sys/lwp.h>
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#endif
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#ifdef HAVE_UCONTEXT_H
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# include <ucontext.h>
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#endif
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#include "wine/port.h"
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#include "thread.h"
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#include "selectors.h"
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#include "server.h"
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#include "winbase.h"
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#include "wine/exception.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(thread)
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/* Xlib critical section (FIXME: does not belong here) */
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CRITICAL_SECTION X11DRV_CritSection = CRITICAL_SECTION_INIT;
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#ifdef linux
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# ifdef HAVE_SCHED_H
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# include <sched.h>
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# endif
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# ifndef CLONE_VM
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# define CLONE_VM 0x00000100
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# define CLONE_FS 0x00000200
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# define CLONE_FILES 0x00000400
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# define CLONE_SIGHAND 0x00000800
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# define CLONE_PID 0x00001000
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# endif /* CLONE_VM */
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#endif /* linux */
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static int init_done;
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#ifndef NO_REENTRANT_LIBC
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/***********************************************************************
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* __errno_location/__error/___errno
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*
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* Get the per-thread errno location.
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*/
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#ifdef HAVE__ERRNO_LOCATION
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int *__errno_location()
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#endif
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#ifdef HAVE__ERROR
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int *__error()
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#endif
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#ifdef HAVE___ERRNO
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int *___errno()
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#endif
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#ifdef HAVE__THR_ERRNO
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int *__thr_errno()
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#endif
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{
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if (!init_done) return perrno;
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#ifdef NO_REENTRANT_X11
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/* Use static libc errno while running in Xlib. */
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if (X11DRV_CritSection.OwningThread == GetCurrentThreadId())
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return perrno;
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#endif
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return &NtCurrentTeb()->thread_errno;
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}
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/***********************************************************************
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* __h_errno_location
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*
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* Get the per-thread h_errno location.
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*/
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int *__h_errno_location()
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{
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if (!init_done) return ph_errno;
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#ifdef NO_REENTRANT_X11
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/* Use static libc h_errno while running in Xlib. */
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if (X11DRV_CritSection.OwningThread == GetCurrentThreadId())
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return ph_errno;
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#endif
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return &NtCurrentTeb()->thread_h_errno;
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}
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#endif /* NO_REENTRANT_LIBC */
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/***********************************************************************
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* SYSDEPS_SetCurThread
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*
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* Make 'thread' the current thread.
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*/
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void SYSDEPS_SetCurThread( TEB *teb )
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{
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#if defined(__i386__)
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/* On the i386, the current thread is in the %fs register */
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__set_fs( teb->teb_sel );
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#elif defined(HAVE__LWP_CREATE)
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/* On non-i386 Solaris, we use the LWP private pointer */
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_lwp_setprivate( teb );
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#endif
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init_done = 1; /* now we can use threading routines */
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}
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/***********************************************************************
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* SYSDEPS_StartThread
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*
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* Startup routine for a new thread.
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*/
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static void SYSDEPS_StartThread( TEB *teb )
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{
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SYSDEPS_SetCurThread( teb );
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CLIENT_InitThread();
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SIGNAL_Init();
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__TRY
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{
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teb->startup();
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}
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__EXCEPT(UnhandledExceptionFilter)
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{
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TerminateThread( GetCurrentThread(), GetExceptionCode() );
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}
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__ENDTRY
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SYSDEPS_ExitThread(0); /* should never get here */
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}
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/***********************************************************************
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* SYSDEPS_SpawnThread
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*
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* Start running a new thread.
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* Return -1 on error, 0 if OK.
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*/
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int SYSDEPS_SpawnThread( TEB *teb )
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{
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#ifndef NO_REENTRANT_LIBC
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#ifdef linux
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const int flags = CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD;
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if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top, flags, teb ) < 0)
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return -1;
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if (!(flags & CLONE_FILES)) close( teb->socket ); /* close the child socket in the parent */
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return 0;
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#endif
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#ifdef HAVE_RFORK
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const int flags = RFPROC | RFMEM; /*|RFFDG*/
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void **sp = (void **)teb->stack_top;
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*--sp = teb;
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*--sp = 0;
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*--sp = SYSDEPS_StartThread;
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__asm__ __volatile__(
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"pushl %2;\n\t" /* flags */
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"pushl $0;\n\t" /* 0 ? */
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"movl %1,%%eax;\n\t" /* SYS_rfork */
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".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
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"cmpl $0, %%edx;\n\t"
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"je 1f;\n\t"
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"movl %0,%%esp;\n\t" /* child -> new thread */
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"ret;\n"
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"1:\n\t" /* parent -> caller thread */
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"addl $8,%%esp" :
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: "r" (sp), "g" (SYS_rfork), "g" (flags)
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: "eax", "edx");
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if (flags & RFFDG) close( teb->socket ); /* close the child socket in the parent */
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return 0;
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#endif
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#ifdef HAVE__LWP_CREATE
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ucontext_t context;
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_lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
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NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
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if ( _lwp_create( &context, 0, NULL ) )
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return -1;
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return 0;
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#endif
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#endif /* NO_REENTRANT_LIBC */
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FIXME("CreateThread: stub\n" );
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return 0;
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}
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/***********************************************************************
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* SYSDEPS_ExitThread
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*
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* Exit a running thread; must not return.
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*/
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void SYSDEPS_ExitThread( int status )
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{
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int socket = NtCurrentTeb()->socket;
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NtCurrentTeb()->socket = -1;
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close( socket );
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#ifdef HAVE__LWP_CREATE
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_lwp_exit();
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#endif
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_exit( status );
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/*
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* It is of course impossible to come here,
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* but it eliminates a compiler warning.
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*/
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exit( status );
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}
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/**********************************************************************
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* NtCurrentTeb (NTDLL.89)
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*
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* This will crash and burn if called before threading is initialized
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*/
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#ifdef __i386__
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__ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
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#elif defined(HAVE__LWP_CREATE)
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struct _TEB * WINAPI NtCurrentTeb(void)
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{
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extern void *_lwp_getprivate(void);
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return (struct _TEB *)_lwp_getprivate();
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}
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#else
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# error NtCurrentTeb not defined for this architecture
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#endif /* __i386__ */
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