2 * System-dependent scheduler support
4 * Copyright 1998 Alexandre Julliard
7 /* Get pointers to the static errno and h_errno variables used by Xlib. This
8 must be done before including <errno.h> makes the variables invisible. */
10 static int *perrno = &errno;
12 static int *ph_errno = &h_errno;
22 /* Xlib critical section (FIXME: does not belong here) */
23 CRITICAL_SECTION X11DRV_CritSection = { 0, };
25 #ifdef HAVE_CLONE_SYSCALL
30 # define CLONE_VM 0x00000100
31 # define CLONE_FS 0x00000200
32 # define CLONE_FILES 0x00000400
33 # define CLONE_SIGHAND 0x00000800
34 # define CLONE_PID 0x00001000
35 /* If we didn't get the flags, we probably didn't get the prototype either */
36 extern int clone( int (*fn)(void *arg), void *stack, int flags, void *arg );
37 # endif /* CLONE_VM */
38 #endif /* HAVE_CLONE_SYSCALL */
42 /***********************************************************************
45 * Get the per-thread errno location.
47 int *__errno_location()
49 THDB *thdb = THREAD_Current();
50 if (!thdb) return perrno;
51 #ifdef NO_REENTRANT_X11
52 /* Use static libc errno while running in Xlib. */
53 if (X11DRV_CritSection.OwningThread == THDB_TO_THREAD_ID(thdb))
56 return &thdb->thread_errno;
59 /***********************************************************************
62 * Get the per-thread h_errno location.
64 int *__h_errno_location()
66 THDB *thdb = THREAD_Current();
67 if (!thdb) return ph_errno;
68 #ifdef NO_REENTRANT_X11
69 /* Use static libc h_errno while running in Xlib. */
70 if (X11DRV_CritSection.OwningThread == THDB_TO_THREAD_ID(thdb))
73 return &thdb->thread_h_errno;
76 /***********************************************************************
79 * Startup routine for a new thread.
81 static void SYSDEPS_StartThread( THDB *thdb )
83 SET_FS( thdb->teb_sel );
86 #endif /* USE_THREADS */
89 /***********************************************************************
92 * Start running a new thread.
93 * Return -1 on error, 0 if OK.
95 int SYSDEPS_SpawnThread( THDB *thread )
99 #ifdef HAVE_CLONE_SYSCALL
100 if (clone( (int (*)(void *))SYSDEPS_StartThread, thread->teb.stack_top,
101 CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, thread ) < 0)
103 /* FIXME: close the child socket in the parent process */
104 /* close( thread->socket );*/
108 FIXME(thread, "Threads using rfork() not implemented\n" );
111 #else /* !USE_THREADS */
112 FIXME(thread, "CreateThread: stub\n" );
113 #endif /* USE_THREADS */
118 /***********************************************************************
121 * Exit a running thread; must not return.
123 void SYSDEPS_ExitThread(void)
125 THDB *thdb = THREAD_Current();
126 close( thdb->socket );
131 /**********************************************************************
132 * NtCurrentTeb (NTDLL.89)
134 * This will crash and burn if called before threading is initialized
136 TEB * WINAPI NtCurrentTeb(void)
141 /* Get the TEB self-pointer */
142 __asm__( ".byte 0x64\n\tmovl (%1),%0"
143 : "=r" (teb) : "r" (&((TEB *)0)->self) );
146 return &pCurrentThread->teb;
147 #endif /* __i386__ */