2 * System-dependent scheduler support
4 * Copyright 1998 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
28 #ifdef HAVE_SYS_SYSCALL_H
29 # include <sys/syscall.h>
34 #ifdef HAVE_UCONTEXT_H
35 # include <ucontext.h>
37 #ifdef HAVE_SYS_MMAN_H
41 #include "wine/server.h"
43 #include "wine/winbase16.h"
44 #include "wine/exception.h"
45 #include "wine/library.h"
46 #include "wine/debug.h"
48 WINE_DEFAULT_DEBUG_CHANNEL(thread);
50 #if defined(linux) || defined(HAVE_CLONE)
55 # define CLONE_VM 0x00000100
56 # define CLONE_FS 0x00000200
57 # define CLONE_FILES 0x00000400
58 # define CLONE_SIGHAND 0x00000800
59 # define CLONE_PID 0x00001000
60 # endif /* CLONE_VM */
61 #endif /* linux || HAVE_CLONE */
63 extern void SELECTOR_FreeFs(void);
65 struct thread_cleanup_info
72 /* temporary stacks used on thread exit */
73 #define TEMP_STACK_SIZE 1024
74 #define NB_TEMP_STACKS 8
75 static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
76 static LONG next_temp_stack; /* next temp stack to use */
78 /***********************************************************************
79 * SYSDEPS_SetCurThread
81 * Make 'thread' the current thread.
83 void SYSDEPS_SetCurThread( TEB *teb )
86 /* On the i386, the current thread is in the %fs register */
87 wine_set_fs( teb->teb_sel );
88 #elif defined(HAVE__LWP_CREATE)
89 /* On non-i386 Solaris, we use the LWP private pointer */
90 _lwp_setprivate( teb );
95 /***********************************************************************
96 * call_on_thread_stack
98 * Call a function once we switched to the thread stack.
100 static void call_on_thread_stack( void *func )
104 void (*funcptr)(void) = func;
107 __EXCEPT(UnhandledExceptionFilter)
109 TerminateThread( GetCurrentThread(), GetExceptionCode() );
112 SYSDEPS_ExitThread(0); /* should never get here */
116 /***********************************************************************
119 * Get a temporary stack address to run the thread exit code on.
121 inline static char *get_temp_stack(void)
123 unsigned int next = InterlockedExchangeAdd( &next_temp_stack, 1 );
124 return temp_stacks[next % NB_TEMP_STACKS];
128 /***********************************************************************
131 * Cleanup the remains of a thread. Runs on a temporary stack.
133 static void cleanup_thread( void *ptr )
135 /* copy the info structure since it is on the stack we will free */
136 struct thread_cleanup_info info = *(struct thread_cleanup_info *)ptr;
137 munmap( info.stack_base, info.stack_size );
139 #ifdef HAVE__LWP_CREATE
142 _exit( info.status );
146 /***********************************************************************
147 * SYSDEPS_StartThread
149 * Startup routine for a new thread.
151 static void SYSDEPS_StartThread( TEB *teb )
153 SYSDEPS_SetCurThread( teb );
160 __EXCEPT(UnhandledExceptionFilter)
162 TerminateThread( GetCurrentThread(), GetExceptionCode() );
165 SYSDEPS_ExitThread(0); /* should never get here */
169 /***********************************************************************
170 * SYSDEPS_SpawnThread
172 * Start running a new thread.
173 * Return -1 on error, 0 if OK.
175 int SYSDEPS_SpawnThread( TEB *teb )
177 #ifdef ERRNO_LOCATION
179 #if defined(linux) || defined(HAVE_CLONE)
180 const int flags = CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD;
181 if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top, flags, teb ) < 0)
183 if (!(flags & CLONE_FILES)) close( teb->request_fd ); /* close the child socket in the parent */
188 const int flags = RFPROC | RFMEM; /*|RFFDG*/
189 void **sp = (void **)teb->stack_top;
192 *--sp = SYSDEPS_StartThread;
193 __asm__ __volatile__(
194 "pushl %2;\n\t" /* flags */
195 "pushl $0;\n\t" /* 0 ? */
196 "movl %1,%%eax;\n\t" /* SYS_rfork */
197 ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
198 "cmpl $0, %%edx;\n\t"
200 "movl %0,%%esp;\n\t" /* child -> new thread */
202 "1:\n\t" /* parent -> caller thread */
204 : "r" (sp), "g" (SYS_rfork), "g" (flags)
206 if (flags & RFFDG) close( teb->request_fd ); /* close the child socket in the parent */
210 #ifdef HAVE__LWP_CREATE
212 _lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
213 NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
214 if ( _lwp_create( &context, 0, NULL ) )
219 #endif /* ERRNO_LOCATION */
221 FIXME("CreateThread: stub\n" );
226 /***********************************************************************
227 * SYSDEPS_CallOnStack
229 void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg ) WINE_NORETURN;
232 __ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
233 "movl 4(%esp),%ecx\n\t" /* func */
234 "movl 8(%esp),%edx\n\t" /* arg */
235 ".byte 0x64\n\tmovl 0x04,%esp\n\t" /* teb->stack_top */
239 "int $3" /* we never return here */ );
240 #elif defined(_MSC_VER)
241 __declspec(naked) void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
243 __asm mov ecx, 4[esp];
244 __asm mov edx, 8[esp];
245 __asm mov fs:[0x04], esp;
251 #endif /* defined(__GNUC__) || defined(_MSC_VER) */
252 #else /* defined(__i386__) */
253 void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
256 while(1); /* avoid warning */
258 #endif /* defined(__i386__) */
261 /***********************************************************************
262 * SYSDEPS_SwitchToThreadStack
264 void SYSDEPS_SwitchToThreadStack( void (*func)(void) )
266 SYSDEPS_CallOnStack( call_on_thread_stack, func );
270 /***********************************************************************
273 * Exit a running thread; must not return.
275 void SYSDEPS_ExitThread( int status )
277 TEB *teb = NtCurrentTeb();
278 struct thread_cleanup_info info;
279 MEMORY_BASIC_INFORMATION meminfo;
281 FreeSelector16( teb->stack_sel );
282 VirtualQuery( teb->stack_top, &meminfo, sizeof(meminfo) );
283 info.stack_base = meminfo.AllocationBase;
284 info.stack_size = meminfo.RegionSize + ((char *)teb->stack_top - (char *)meminfo.AllocationBase);
285 info.status = status;
289 VirtualFree( teb->stack_base, 0, MEM_RELEASE | MEM_SYSTEM );
290 close( teb->wait_fd[0] );
291 close( teb->wait_fd[1] );
292 close( teb->reply_fd );
293 close( teb->request_fd );
294 teb->stack_low = get_temp_stack();
295 teb->stack_top = (char *) teb->stack_low + TEMP_STACK_SIZE;
296 SYSDEPS_CallOnStack( cleanup_thread, &info );
300 /***********************************************************************
301 * SYSDEPS_AbortThread
303 * Same as SYSDEPS_ExitThread, but must not do anything that requires a server call.
305 void SYSDEPS_AbortThread( int status )
308 close( NtCurrentTeb()->wait_fd[0] );
309 close( NtCurrentTeb()->wait_fd[1] );
310 close( NtCurrentTeb()->reply_fd );
311 close( NtCurrentTeb()->request_fd );
312 #ifdef HAVE__LWP_CREATE
315 for (;;) /* avoid warning */
320 /**********************************************************************
321 * NtCurrentTeb (NTDLL.@)
323 * This will crash and burn if called before threading is initialized
325 #if defined(__i386__) && defined(__GNUC__)
326 __ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
327 #elif defined(__i386__) && defined(_MSC_VER)
328 /* Nothing needs to be done. MS C "magically" exports the inline version from winnt.h */
329 #elif defined(HAVE__LWP_CREATE)
330 /***********************************************************************
331 * NtCurrentTeb (NTDLL.@)
333 struct _TEB * WINAPI NtCurrentTeb(void)
335 extern void *_lwp_getprivate(void);
336 return (struct _TEB *)_lwp_getprivate();
339 # error NtCurrentTeb not defined for this architecture
340 #endif /* __i386__ */