mirror of
https://github.com/reactos/wine.git
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311 lines
8.8 KiB
C
311 lines
8.8 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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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <signal.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
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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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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#ifdef HAVE_SCHED_H
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#include <sched.h>
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#endif
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#include "ntstatus.h"
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#include "thread.h"
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#include "wine/pthread.h"
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#include "wine/server.h"
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#include "winbase.h"
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#include "wine/library.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(thread);
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struct thread_cleanup_info
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{
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void *stack_base;
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int stack_size;
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int status;
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};
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/* temporary stacks used on thread exit */
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#define TEMP_STACK_SIZE 1024
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#define NB_TEMP_STACKS 8
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static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
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static LONG next_temp_stack; /* next temp stack to use */
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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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LDT_ENTRY fs_entry;
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wine_ldt_set_base( &fs_entry, teb );
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wine_ldt_set_limit( &fs_entry, 0xfff );
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wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
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wine_ldt_init_fs( teb->teb_sel, &fs_entry );
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#elif defined(__powerpc__)
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/* On PowerPC, the current TEB is in the gpr13 register */
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# ifdef __APPLE__
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__asm__ __volatile__("mr r13, %0" : : "r" (teb));
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# else
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__asm__ __volatile__("mr 2, %0" : : "r" (teb));
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# endif
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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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#ifdef HAVE_NPTL
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teb->pthread_data = (void *)pthread_self();
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#else
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wine_pthread_init_thread();
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#endif
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}
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/***********************************************************************
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* get_temp_stack
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*
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* Get a temporary stack address to run the thread exit code on.
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*/
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inline static char *get_temp_stack(void)
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{
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unsigned int next = interlocked_xchg_add( &next_temp_stack, 1 );
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return temp_stacks[next % NB_TEMP_STACKS] + TEMP_STACK_SIZE;
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}
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/***********************************************************************
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* cleanup_thread
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*
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* Cleanup the remains of a thread. Runs on a temporary stack.
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*/
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static void cleanup_thread( void *ptr )
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{
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/* copy the info structure since it is on the stack we will free */
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struct thread_cleanup_info info = *(struct thread_cleanup_info *)ptr;
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munmap( info.stack_base, info.stack_size );
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wine_ldt_free_fs( wine_get_fs() );
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#ifdef HAVE__LWP_CREATE
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_lwp_exit();
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#endif
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_exit( info.status );
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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( void (*func)(TEB *), TEB *teb )
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{
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#ifdef HAVE_NPTL
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pthread_t id;
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pthread_attr_t attr;
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pthread_attr_init( &attr );
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pthread_attr_setstack( &attr, teb->DeallocationStack,
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(char *)teb->Tib.StackBase - (char *)teb->DeallocationStack );
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if (pthread_create( &id, &attr, (void * (*)(void *))func, teb )) return -1;
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return 0;
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#elif defined(HAVE_CLONE)
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if (clone( (int (*)(void *))func, teb->Tib.StackBase,
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CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, teb ) < 0)
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return -1;
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return 0;
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#elif defined(HAVE_RFORK)
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void **sp = (void **)teb->Tib.StackBase;
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*--sp = teb;
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*--sp = 0;
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*--sp = func;
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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" (RFPROC | RFMEM)
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: "eax", "edx");
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return 0;
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#elif defined(HAVE__LWP_CREATE)
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ucontext_t context;
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_lwp_makecontext( &context, (void(*)(void *))func, teb,
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NULL, teb->DeallocationStack, (char *)teb->Tib.StackBase - (char *)teb->DeallocationStack );
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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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FIXME("CreateThread: stub\n" );
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return -1;
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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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TEB *teb = NtCurrentTeb();
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DWORD size = 0;
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#ifdef HAVE_NPTL
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static TEB *teb_to_free;
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TEB *free_teb;
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if ((free_teb = interlocked_xchg_ptr( (void **)&teb_to_free, teb )) != NULL)
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{
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void *ptr;
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TRACE("freeing prev teb %p stack %p fs %04x\n",
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free_teb, free_teb->DeallocationStack, free_teb->teb_sel );
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pthread_join( (pthread_t)free_teb->pthread_data, &ptr );
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wine_ldt_free_fs( free_teb->teb_sel );
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ptr = free_teb->DeallocationStack;
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NtFreeVirtualMemory( GetCurrentProcess(), &ptr, &size, MEM_RELEASE );
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}
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SYSDEPS_AbortThread( status );
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#else
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struct thread_cleanup_info info;
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MEMORY_BASIC_INFORMATION meminfo;
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NtQueryVirtualMemory( GetCurrentProcess(), teb->Tib.StackBase, MemoryBasicInformation,
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&meminfo, sizeof(meminfo), NULL );
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info.stack_base = meminfo.AllocationBase;
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info.stack_size = meminfo.RegionSize + ((char *)teb->Tib.StackBase - (char *)meminfo.AllocationBase);
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info.status = status;
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SIGNAL_Block();
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size = 0;
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NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE | MEM_SYSTEM );
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close( teb->wait_fd[0] );
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close( teb->wait_fd[1] );
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close( teb->reply_fd );
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close( teb->request_fd );
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SIGNAL_Reset();
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wine_switch_to_stack( cleanup_thread, &info, get_temp_stack() );
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#endif
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}
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/***********************************************************************
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* SYSDEPS_AbortThread
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*
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* Same as SYSDEPS_ExitThread, but must not do anything that requires a server call.
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*/
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void SYSDEPS_AbortThread( int status )
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{
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SIGNAL_Block();
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close( NtCurrentTeb()->wait_fd[0] );
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close( NtCurrentTeb()->wait_fd[1] );
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close( NtCurrentTeb()->reply_fd );
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close( NtCurrentTeb()->request_fd );
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#ifdef HAVE_NPTL
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pthread_exit( (void *)status );
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#endif
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SIGNAL_Reset();
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#ifdef HAVE__LWP_CREATE
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_lwp_exit();
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#endif
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for (;;) /* avoid warning */
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_exit( status );
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}
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/***********************************************************************
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* SYSDEPS_GetUnixTid
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*
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* Get the Unix tid of the current thread.
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*/
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int SYSDEPS_GetUnixTid(void)
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{
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#ifdef HAVE__LWP_SELF
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return _lwp_self();
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#elif defined(__linux__) && defined(__i386__)
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int ret;
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__asm__("int $0x80" : "=a" (ret) : "0" (224) /* SYS_gettid */);
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if (ret < 0) ret = -1;
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return ret;
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#else
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return -1;
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#endif
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}
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/**********************************************************************
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* NtCurrentTeb (NTDLL.@)
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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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#if defined(__i386__) && defined(__GNUC__)
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__ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
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#elif defined(__i386__) && defined(_MSC_VER)
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/* Nothing needs to be done. MS C "magically" exports the inline version from winnt.h */
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#elif defined(HAVE__LWP_CREATE)
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/***********************************************************************
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* NtCurrentTeb (NTDLL.@)
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*/
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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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#elif defined(__powerpc__)
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# ifdef __APPLE__
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__ASM_GLOBAL_FUNC( NtCurrentTeb, "\n\tmr r3,r13\n\tblr" );
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# else
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__ASM_GLOBAL_FUNC( NtCurrentTeb, "\n\tmr 3,2\n\tblr" );
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# endif
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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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