| /* |
| * System-dependent scheduler support |
| * |
| * Copyright 1998 Alexandre Julliard |
| */ |
| |
| /* Get pointers to the static errno and h_errno variables used by Xlib. This |
| must be done before including <errno.h> makes the variables invisible. */ |
| extern int errno; |
| static int *perrno = &errno; |
| extern int h_errno; |
| static int *ph_errno = &h_errno; |
| |
| #include <signal.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include "thread.h" |
| #include "winbase.h" |
| |
| /* Xlib critical section (FIXME: does not belong here) */ |
| CRITICAL_SECTION X11DRV_CritSection = { 0, }; |
| |
| #ifdef __linux__ |
| # ifdef HAVE_SCHED_H |
| # include <sched.h> |
| # endif |
| # ifndef CLONE_VM |
| # define CLONE_VM 0x00000100 |
| # define CLONE_FS 0x00000200 |
| # define CLONE_FILES 0x00000400 |
| # define CLONE_SIGHAND 0x00000800 |
| # define CLONE_PID 0x00001000 |
| /* If we didn't get the flags, we probably didn't get the prototype either */ |
| extern int clone( int (*fn)(void *arg), void *stack, int flags, void *arg ); |
| # endif /* CLONE_VM */ |
| #endif /* __linux__ */ |
| |
| |
| #ifdef __linux__ |
| /*********************************************************************** |
| * __errno_location |
| * |
| * Get the per-thread errno location. |
| */ |
| int *__errno_location() |
| { |
| THDB *thdb = THREAD_Current(); |
| if (!thdb) return perrno; |
| #ifdef NO_REENTRANT_X11 |
| /* Use static libc errno while running in Xlib. */ |
| if (X11DRV_CritSection.OwningThread == THDB_TO_THREAD_ID(thdb)) |
| return perrno; |
| #endif |
| return &thdb->thread_errno; |
| } |
| |
| /*********************************************************************** |
| * __h_errno_location |
| * |
| * Get the per-thread h_errno location. |
| */ |
| int *__h_errno_location() |
| { |
| THDB *thdb = THREAD_Current(); |
| if (!thdb) return ph_errno; |
| #ifdef NO_REENTRANT_X11 |
| /* Use static libc h_errno while running in Xlib. */ |
| if (X11DRV_CritSection.OwningThread == THDB_TO_THREAD_ID(thdb)) |
| return ph_errno; |
| #endif |
| return &thdb->thread_h_errno; |
| } |
| |
| /*********************************************************************** |
| * SYSDEPS_StartThread |
| * |
| * Startup routine for a new thread. |
| */ |
| static void SYSDEPS_StartThread( THDB *thdb ) |
| { |
| LPTHREAD_START_ROUTINE func = (LPTHREAD_START_ROUTINE)thdb->entry_point; |
| thdb->unix_pid = getpid(); |
| SET_FS( thdb->teb_sel ); |
| ExitThread( func( thdb->entry_arg ) ); |
| } |
| #endif /* __linux__ */ |
| |
| |
| /*********************************************************************** |
| * SYSDEPS_SpawnThread |
| * |
| * Start running a new thread. |
| * Return -1 on error, 0 if OK. |
| */ |
| int SYSDEPS_SpawnThread( THDB *thread ) |
| { |
| #ifdef __linux__ |
| if (clone( (int (*)(void *))SYSDEPS_StartThread, thread->teb.stack_top, |
| CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, thread ) < 0) |
| return -1; |
| #else |
| FIXME(thread, "CreateThread: stub\n" ); |
| #endif /* __linux__ */ |
| return 0; |
| } |
| |
| |
| /*********************************************************************** |
| * SYSDEPS_ExitThread |
| * |
| * Exit a running thread; must not return. |
| */ |
| void SYSDEPS_ExitThread(void) |
| { |
| _exit( 0 ); |
| } |
| |
| |
| /********************************************************************** |
| * NtCurrentTeb (NTDLL.89) |
| * |
| * This will crash and burn if called before threading is initialized |
| */ |
| TEB * WINAPI NtCurrentTeb(void) |
| { |
| #ifdef __i386__ |
| TEB *teb; |
| |
| /* Get the TEB self-pointer */ |
| __asm__( ".byte 0x64\n\tmovl (%1),%0" |
| : "=r" (teb) : "r" (&((TEB *)0)->self) ); |
| return teb; |
| #else |
| return &pCurrentThread->teb; |
| #endif /* __i386__ */ |
| } |