loader/kthread.c

   1 /*
   2  * pthread emulation based on kernel threads
   3  *
   4  * We can't use pthreads directly, so why not let libcs
   5  * that want pthreads use Wine's own threading instead...
   6  *
   7  * Copyright 1999 Ove Kåven
   8  * Copyright 2003 Alexandre Julliard
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 struct _pthread_cleanup_buffer;
  29
  30 #include <assert.h>
  31 #include <errno.h>
  32 #include <stdlib.h>
  33 #include <signal.h>
  34 #include <setjmp.h>
  35 #ifdef HAVE_UNISTD_H
  36 # include <unistd.h>
  37 #endif
  38 #include <string.h>
  39 #include <sys/types.h>
  40 #ifdef HAVE_SYS_SOCKET_H
  41 # include <sys/socket.h>
  42 #endif
  43 #ifdef HAVE_SYS_MMAN_H
  44 #include <sys/mman.h>
  45 #endif
  46 #ifdef HAVE_NETINET_IN_H
  47 # include <netinet/in.h>
  48 #endif
  49 #ifdef HAVE_ARPA_NAMESER_H
  50 # include <arpa/nameser.h>
  51 #endif
  52 #ifdef HAVE_RESOLV_H
  53 # include <resolv.h>
  54 #endif
  55 #ifdef HAVE_VALGRIND_MEMCHECK_H
  56 #include <valgrind/memcheck.h>
  57 #endif
  58 #ifdef HAVE_SYS_SYSCALL_H
  59 # include <sys/syscall.h>
  60 #endif
  61 #ifdef HAVE_SCHED_H
  62 #include <sched.h>
  63 #endif
  64
  65 #include "wine/library.h"
  66 #include "wine/pthread.h"
  67
  68 #define P_OUTPUT(stuff) write(2,stuff,strlen(stuff))
  69
  70 #define PSTR(str) __ASM_NAME(#str)
  71
  72 static struct wine_pthread_callbacks funcs;
  73
  74 /* thread descriptor */
  75
  76 #define FIRST_KEY 0
  77 #define MAX_KEYS 16 /* libc6 doesn't use that many, but... */
  78 #define MAX_TSD  16
  79
  80 struct pthread_descr_struct
  81 {
  82     char               dummy[2048];
  83     int                thread_errno;
  84     int                thread_h_errno;
  85     int                cancel_state;
  86     int                cancel_type;
  87     struct __res_state res_state;
  88     const void        *key_data[MAX_KEYS];  /* for normal pthread keys */
  89     const void        *tsd_data[MAX_TSD];   /* for libc internal tsd variables */
  90 };
  91
  92 typedef struct pthread_descr_struct *pthread_descr;
  93
  94 static struct pthread_descr_struct initial_descr;
  95
  96 pthread_descr __pthread_thread_self(void)
  97 {
  98     struct pthread_descr_struct *descr;
  99     if (!funcs.ptr_get_thread_data) return &initial_descr;
 100     descr = funcs.ptr_get_thread_data();
 101     if (!descr) return &initial_descr;
 102     return descr;
 103 }
 104
 105 static int (*libc_uselocale)(int set);
 106 static int *libc_multiple_threads;
 107
 108 /***********************************************************************
 109  *           __errno_location/__error/__errno/___errno/__thr_errno
 110  *
 111  * Get the per-thread errno location.
 112  */
 113 int *__errno_location(void)                            /* Linux */
 114 {
 115     pthread_descr descr = __pthread_thread_self();
 116     return &descr->thread_errno;
 117 }
 118 int *__error(void)     { return __errno_location(); }  /* FreeBSD */
 119 int *__errno(void)     { return __errno_location(); }  /* NetBSD */
 120 int *___errno(void)    { return __errno_location(); }  /* Solaris */
 121 int *__thr_errno(void) { return __errno_location(); }  /* UnixWare */
 122
 123 /***********************************************************************
 124  *           __h_errno_location
 125  *
 126  * Get the per-thread h_errno location.
 127  */
 128 int *__h_errno_location(void)
 129 {
 130     pthread_descr descr = __pthread_thread_self();
 131     return &descr->thread_h_errno;
 132 }
 133
 134 struct __res_state *__res_state(void)
 135 {
 136     pthread_descr descr = __pthread_thread_self();
 137     return &descr->res_state;
 138 }
 139
 140 static inline void writejump( const char *symbol, void *dest )
 141 {
 142 #if defined(__GLIBC__) && defined(__i386__)
 143     unsigned char *addr = wine_dlsym( RTLD_NEXT, symbol, NULL, 0 );
 144
 145     if (!addr) return;
 146
 147     /* write a relative jump at the function address */
 148     mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC|PROT_WRITE);
 149     addr[0] = 0xe9;
 150     *(int *)(addr+1) = (unsigned char *)dest - (addr + 5);
 151     mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC);
 152
 153 # ifdef HAVE_VALGRIND_MEMCHECK_H
 154     VALGRIND_DISCARD_TRANSLATIONS( addr, 5 );
 155 # endif
 156 #endif  /* __GLIBC__ && __i386__ */
 157 }
 158
 159 /* temporary stacks used on thread exit */
 160 #define TEMP_STACK_SIZE 1024
 161 #define NB_TEMP_STACKS  8
 162 static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
 163 static int next_temp_stack;  /* next temp stack to use */
 164
 165 /***********************************************************************
 166  *           get_temp_stack
 167  *
 168  * Get a temporary stack address to run the thread exit code on.
 169  */
 170 static inline char *get_temp_stack(void)
 171 {
 172     unsigned int next = interlocked_xchg_add( &next_temp_stack, 1 );
 173     return temp_stacks[next % NB_TEMP_STACKS] + TEMP_STACK_SIZE;
 174 }
 175
 176
 177 /***********************************************************************
 178  *           cleanup_thread
 179  *
 180  * Cleanup the remains of a thread. Runs on a temporary stack.
 181  */
 182 static void cleanup_thread( void *ptr )
 183 {
 184     /* copy the info structure since it is on the stack we will free */
 185     struct wine_pthread_thread_info info = *(struct wine_pthread_thread_info *)ptr;
 186     wine_ldt_free_fs( info.teb_sel );
 187     if (info.stack_size) munmap( info.stack_base, info.stack_size );
 188     if (info.teb_size) munmap( info.teb_base, info.teb_size );
 189     _exit( info.exit_status );
 190 }
 191
 192
 193 /***********************************************************************
 194  *           init_process
 195  *
 196  * Initialization for a newly created process.
 197  */
 198 static void init_process( const struct wine_pthread_callbacks *callbacks, size_t size )
 199 {
 200     memcpy( &funcs, callbacks, min( size, sizeof(funcs) ));
 201     funcs.ptr_set_thread_data( &initial_descr );
 202 }
 203
 204
 205 /***********************************************************************
 206  *           init_thread
 207  *
 208  * Initialization for a newly created thread.
 209  */
 210 static void init_thread( struct wine_pthread_thread_info *info )
 211 {
 212     struct pthread_descr_struct *descr;
 213
 214     if (funcs.ptr_set_thread_data)
 215     {
 216         descr = calloc( 1, sizeof(*descr) );
 217         funcs.ptr_set_thread_data( descr );
 218         if (libc_multiple_threads) *libc_multiple_threads = 1;
 219     }
 220     else  /* first thread */
 221     {
 222         descr = &initial_descr;
 223         writejump( "__errno_location", __errno_location );
 224         writejump( "__h_errno_location", __h_errno_location );
 225         writejump( "__res_state", __res_state );
 226     }
 227     descr->cancel_state = PTHREAD_CANCEL_ENABLE;
 228     descr->cancel_type  = PTHREAD_CANCEL_ASYNCHRONOUS;
 229     if (libc_uselocale) libc_uselocale( -1 /*LC_GLOBAL_LOCALE*/ );
 230 }
 231
 232
 233 /***********************************************************************
 234  *           create_thread
 235  */
 236 static int create_thread( struct wine_pthread_thread_info *info )
 237 {
 238     if (!info->stack_base)
 239     {
 240         info->stack_base = wine_anon_mmap( NULL, info->stack_size, PROT_READ | PROT_WRITE, 0 );
 241         if (info->stack_base == (void *)-1) return -1;
 242     }
 243 #ifdef HAVE_CLONE
 244     if (clone( (int (*)(void *))info->entry, (char *)info->stack_base + info->stack_size,
 245                CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, info ) < 0)
 246         return -1;
 247     return 0;
 248 #elif defined(HAVE_RFORK)
 249     {
 250         void **sp = (void **)((char *)info->stack_base + info->stack_size);
 251         *--sp = info;
 252         *--sp = 0;
 253         *--sp = info->entry;
 254         __asm__ __volatile__(
 255             "pushl %2;\n\t"             /* flags */
 256             "pushl $0;\n\t"             /* 0 ? */
 257             "movl %1,%%eax;\n\t"        /* SYS_rfork */
 258             ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
 259             "cmpl $0, %%edx;\n\t"
 260             "je 1f;\n\t"
 261             "movl %0,%%esp;\n\t"        /* child -> new thread */
 262             "ret;\n"
 263             "1:\n\t"                    /* parent -> caller thread */
 264             "addl $8,%%esp" :
 265             : "r" (sp), "r" (SYS_rfork), "r" (RFPROC | RFMEM | RFTHREAD)
 266             : "eax", "edx");
 267         return 0;
 268     }
 269 #endif
 270     return -1;
 271 }
 272
 273
 274 /***********************************************************************
 275  *           init_current_teb
 276  *
 277  * Set the current TEB for a new thread.
 278  */
 279 static void init_current_teb( struct wine_pthread_thread_info *info )
 280 {
 281     /* On the i386, the current thread is in the %fs register */
 282     LDT_ENTRY fs_entry;
 283
 284     wine_ldt_set_base( &fs_entry, info->teb_base );
 285     wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
 286     wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 287     wine_ldt_init_fs( info->teb_sel, &fs_entry );
 288
 289     /* set pid and tid */
 290     info->pid = getpid();
 291     info->tid = -1;
 292 }
 293
 294
 295 /***********************************************************************
 296  *           get_current_teb
 297  */
 298 static void *get_current_teb(void)
 299 {
 300     void *ret;
 301     __asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
 302     return ret;
 303 }
 304
 305
 306 /***********************************************************************
 307  *           exit_thread
 308  */
 309 static void DECLSPEC_NORETURN exit_thread( struct wine_pthread_thread_info *info )
 310 {
 311     wine_switch_to_stack( cleanup_thread, info, get_temp_stack() );
 312 }
 313
 314
 315 /***********************************************************************
 316  *           abort_thread
 317  */
 318 static void DECLSPEC_NORETURN abort_thread( long status )
 319 {
 320     _exit( status );
 321 }
 322
 323
 324 /***********************************************************************
 325  *           pthread_functions
 326  */
 327 const struct wine_pthread_functions pthread_functions =
 328 {
 329     init_process,
 330     init_thread,
 331     create_thread,
 332     init_current_teb,
 333     get_current_teb,
 334     exit_thread,
 335     abort_thread,
 336     sigprocmask
 337 };
 338
 339
 340 /* Currently this probably works only for glibc2,
 341  * which checks for the presence of double-underscore-prepended
 342  * pthread primitives, and use them if available.
 343  * If they are not available, the libc defaults to
 344  * non-threadsafe operation (not good). */
 345
 346 #if defined(HAVE_PTHREAD_H) && (defined(__GLIBC__) || defined(__FreeBSD__))
 347
 348 /* adapt as necessary (a construct like this is used in glibc sources) */
 349 #define strong_alias(orig, alias) \
 350  asm(".globl " PSTR(alias) "\n" \
 351      "\t.set " PSTR(alias) "," PSTR(orig))
 352
 353 struct fork_block;
 354
 355 /* pthread functions redirection */
 356
 357 struct pthread_functions
 358 {
 359   pid_t (*ptr_pthread_fork) (struct fork_block *);
 360   int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
 361   int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
 362   int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
 363   int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
 364   int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
 365   int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
 366   int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
 367   int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *, struct sched_param *);
 368   int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *, const struct sched_param *);
 369   int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
 370   int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
 371   int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
 372   int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
 373   int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
 374   int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
 375   int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
 376   int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
 377   int (*ptr___pthread_cond_init) (pthread_cond_t *, const pthread_condattr_t *);
 378   int (*ptr___pthread_cond_signal) (pthread_cond_t *);
 379   int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
 380   int (*ptr_pthread_equal) (pthread_t, pthread_t);
 381   void (*ptr___pthread_exit) (void *);
 382   int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
 383   int (*ptr_pthread_setschedparam) (pthread_t, int, const struct sched_param *);
 384   int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
 385   int (*ptr_pthread_mutex_init) (pthread_mutex_t *, const pthread_mutexattr_t *);
 386   int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
 387   int (*ptr_pthread_mutex_trylock) (pthread_mutex_t *);
 388   int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
 389   pthread_t (*ptr_pthread_self) (void);
 390   int (*ptr_pthread_setcancelstate) (int, int *);
 391   int (*ptr_pthread_setcanceltype) (int, int *);
 392   void (*ptr_pthread_do_exit) (void *retval, char *currentframe);
 393   void (*ptr_pthread_cleanup_upto) (jmp_buf target, char *targetframe);
 394   pthread_descr (*ptr_pthread_thread_self) (void);
 395   int (*ptr_pthread_internal_tsd_set) (int key, const void *pointer);
 396   void * (*ptr_pthread_internal_tsd_get) (int key);
 397   void ** __attribute__ ((__const__)) (*ptr_pthread_internal_tsd_address) (int key);
 398   int (*ptr_pthread_sigaction) (int sig, const struct sigaction * act, struct sigaction *oact);
 399   int (*ptr_pthread_sigwait) (const sigset_t *set, int *sig);
 400   int (*ptr_pthread_raise) (int sig);
 401   int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *, const struct timespec *);
 402   void (*ptr__pthread_cleanup_push) (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg);
 403   void (*ptr__pthread_cleanup_pop) (struct _pthread_cleanup_buffer * buffer, int execute);
 404 };
 405
 406 static pid_t (*libc_fork)(void);
 407 static int (*libc_sigaction)(int signum, const struct sigaction *act, struct sigaction *oldact);
 408 static int *(*libc_pthread_init)( const struct pthread_functions *funcs );
 409
 410 static struct pthread_functions libc_pthread_functions;
 411
 412 strong_alias(__pthread_thread_self, pthread_thread_self);
 413
 414 /* redefine this to prevent libpthread from overriding our function pointers */
 415 int *__libc_pthread_init( const struct pthread_functions *funcs )
 416 {
 417     return libc_multiple_threads;
 418 }
 419
 420 typedef struct _wine_cleanup {
 421   void (*routine)(void *);
 422   void *arg;
 423 } *wine_cleanup;
 424
 425 int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void*
 426         (*start_routine)(void *), void* arg)
 427 {
 428     assert( funcs.ptr_pthread_create );
 429     return funcs.ptr_pthread_create( thread, attr, start_routine, arg );
 430 }
 431
 432 int pthread_cancel(pthread_t thread)
 433 {
 434     assert( funcs.ptr_pthread_cancel );
 435     return funcs.ptr_pthread_cancel( thread );
 436 }
 437
 438 int pthread_join(pthread_t thread, void **value_ptr)
 439 {
 440     assert( funcs.ptr_pthread_join );
 441     return funcs.ptr_pthread_join( thread, value_ptr );
 442 }
 443
 444 int pthread_detach(pthread_t thread)
 445 {
 446     assert( funcs.ptr_pthread_detach );
 447     return funcs.ptr_pthread_detach( thread );
 448 }
 449
 450 /* FIXME: we have no equivalents in win32 for the policys */
 451 /* so just keep this as a stub */
 452 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
 453 {
 454   P_OUTPUT("FIXME:pthread_attr_setschedpolicy\n");
 455   return 0;
 456 }
 457
 458 /* FIXME: no win32 equivalent for scope */
 459 int pthread_attr_setscope(pthread_attr_t *attr, int scope)
 460 {
 461   P_OUTPUT("FIXME:pthread_attr_setscope\n");
 462   return 0; /* return success */
 463 }
 464
 465 /* FIXME: no win32 equivalent for schedule param */
 466 int pthread_attr_setschedparam(pthread_attr_t *attr,
 467     const struct sched_param *param)
 468 {
 469   P_OUTPUT("FIXME:pthread_attr_setschedparam\n");
 470   return 0; /* return success */
 471 }
 472
 473 /* FIXME */
 474 int pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
 475 {
 476   return 0; /* return success */
 477 }
 478
 479 int __pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
 480 {
 481     static pthread_once_t the_once = PTHREAD_ONCE_INIT;
 482     int once_now;
 483
 484     memcpy(&once_now,&the_once,sizeof(once_now));
 485     if (interlocked_cmpxchg((int*)once_control, once_now+1, once_now) == once_now)
 486         (*init_routine)();
 487     return 0;
 488 }
 489 strong_alias(__pthread_once, pthread_once);
 490
 491 void __pthread_kill_other_threads_np(void)
 492 {
 493     /* we don't need to do anything here */
 494 }
 495 strong_alias(__pthread_kill_other_threads_np, pthread_kill_other_threads_np);
 496
 497 /***** atfork *****/
 498
 499 #define MAX_ATFORK 8  /* libc doesn't need that many anyway */
 500
 501 static pthread_mutex_t atfork_mutex = PTHREAD_MUTEX_INITIALIZER;
 502
 503 typedef void (*atfork_handler)(void);
 504 static atfork_handler atfork_prepare[MAX_ATFORK];
 505 static atfork_handler atfork_parent[MAX_ATFORK];
 506 static atfork_handler atfork_child[MAX_ATFORK];
 507 static int atfork_count;
 508
 509 int __pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
 510 {
 511     pthread_mutex_lock( &atfork_mutex );
 512     assert( atfork_count < MAX_ATFORK );
 513     atfork_prepare[atfork_count] = prepare;
 514     atfork_parent[atfork_count] = parent;
 515     atfork_child[atfork_count] = child;
 516     atfork_count++;
 517     pthread_mutex_unlock( &atfork_mutex );
 518     return 0;
 519 }
 520 strong_alias(__pthread_atfork, pthread_atfork);
 521
 522 pid_t __fork(void)
 523 {
 524     pid_t pid;
 525     int i;
 526
 527     if (!libc_fork)
 528     {
 529         libc_fork = wine_dlsym( RTLD_NEXT, "fork", NULL, 0 );
 530         assert( libc_fork );
 531     }
 532     pthread_mutex_lock( &atfork_mutex );
 533     /* prepare handlers are called in reverse insertion order */
 534     for (i = atfork_count - 1; i >= 0; i--) if (atfork_prepare[i]) atfork_prepare[i]();
 535     if (!(pid = libc_fork()))
 536     {
 537         pthread_mutex_init( &atfork_mutex, NULL );
 538         for (i = 0; i < atfork_count; i++) if (atfork_child[i]) atfork_child[i]();
 539     }
 540     else
 541     {
 542         for (i = 0; i < atfork_count; i++) if (atfork_parent[i]) atfork_parent[i]();
 543         pthread_mutex_unlock( &atfork_mutex );
 544     }
 545     return pid;
 546 }
 547 strong_alias(__fork, fork);
 548
 549 /***** MUTEXES *****/
 550
 551 int __pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr)
 552 {
 553     if (!funcs.ptr_pthread_mutex_init) return 0;
 554     return funcs.ptr_pthread_mutex_init( mutex, mutexattr );
 555 }
 556 strong_alias(__pthread_mutex_init, pthread_mutex_init);
 557
 558 int __pthread_mutex_lock(pthread_mutex_t *mutex)
 559 {
 560     if (!funcs.ptr_pthread_mutex_lock) return 0;
 561     return funcs.ptr_pthread_mutex_lock( mutex );
 562 }
 563 strong_alias(__pthread_mutex_lock, pthread_mutex_lock);
 564
 565 int __pthread_mutex_trylock(pthread_mutex_t *mutex)
 566 {
 567     if (!funcs.ptr_pthread_mutex_trylock) return 0;
 568     return funcs.ptr_pthread_mutex_trylock( mutex );
 569 }
 570 strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock);
 571
 572 int __pthread_mutex_unlock(pthread_mutex_t *mutex)
 573 {
 574     if (!funcs.ptr_pthread_mutex_unlock) return 0;
 575     return funcs.ptr_pthread_mutex_unlock( mutex );
 576 }
 577 strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
 578
 579 int __pthread_mutex_destroy(pthread_mutex_t *mutex)
 580 {
 581     if (!funcs.ptr_pthread_mutex_destroy) return 0;
 582     return funcs.ptr_pthread_mutex_destroy( mutex );
 583 }
 584 strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy);
 585
 586
 587 /***** MUTEX ATTRIBUTES *****/
 588 /* just dummies, since critical sections are always recursive */
 589
 590 int __pthread_mutexattr_init(pthread_mutexattr_t *attr)
 591 {
 592   return 0;
 593 }
 594 strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init);
 595
 596 int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
 597 {
 598   return 0;
 599 }
 600 strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy);
 601
 602 int __pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
 603 {
 604   return 0;
 605 }
 606 strong_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
 607
 608 int __pthread_mutexattr_getkind_np(pthread_mutexattr_t *attr, int *kind)
 609 {
 610   *kind = PTHREAD_MUTEX_RECURSIVE;
 611   return 0;
 612 }
 613 strong_alias(__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
 614
 615 int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind)
 616 {
 617   return 0;
 618 }
 619 strong_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype);
 620
 621 int __pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *kind)
 622 {
 623   *kind = PTHREAD_MUTEX_RECURSIVE;
 624   return 0;
 625 }
 626 strong_alias(__pthread_mutexattr_gettype, pthread_mutexattr_gettype);
 627
 628
 629 /***** THREAD-SPECIFIC VARIABLES (KEYS) *****/
 630
 631 int __pthread_key_create(pthread_key_t *key, void (*destr_function)(void *))
 632 {
 633     static int keycnt = FIRST_KEY;
 634     *key = interlocked_xchg_add(&keycnt, 1);
 635     return 0;
 636 }
 637 strong_alias(__pthread_key_create, pthread_key_create);
 638
 639 int __pthread_key_delete(pthread_key_t key)
 640 {
 641   return 0;
 642 }
 643 strong_alias(__pthread_key_delete, pthread_key_delete);
 644
 645 int __pthread_setspecific(pthread_key_t key, const void *pointer)
 646 {
 647     pthread_descr descr = __pthread_thread_self();
 648     descr->key_data[key] = pointer;
 649     return 0;
 650 }
 651 strong_alias(__pthread_setspecific, pthread_setspecific);
 652
 653 void *__pthread_getspecific(pthread_key_t key)
 654 {
 655     pthread_descr descr = __pthread_thread_self();
 656     return (void *)descr->key_data[key];
 657 }
 658 strong_alias(__pthread_getspecific, pthread_getspecific);
 659
 660 static int pthread_internal_tsd_set( int key, const void *pointer )
 661 {
 662     pthread_descr descr = __pthread_thread_self();
 663     descr->tsd_data[key] = pointer;
 664     return 0;
 665 }
 666 int (*__libc_internal_tsd_set)(int, const void *) = pthread_internal_tsd_set;
 667
 668 static void *pthread_internal_tsd_get( int key )
 669 {
 670     pthread_descr descr = __pthread_thread_self();
 671     return (void *)descr->tsd_data[key];
 672 }
 673 void* (*__libc_internal_tsd_get)(int) = pthread_internal_tsd_get;
 674
 675 static void ** __attribute__((const)) pthread_internal_tsd_address( int key )
 676 {
 677     pthread_descr descr = __pthread_thread_self();
 678     return (void **)&descr->tsd_data[key];
 679 }
 680 void** (*__libc_internal_tsd_address)(int) = pthread_internal_tsd_address;
 681
 682 /***** "EXCEPTION" FRAMES *****/
 683 /* not implemented right now */
 684
 685 void _pthread_cleanup_push(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 686 {
 687   ((wine_cleanup)buffer)->routine = routine;
 688   ((wine_cleanup)buffer)->arg = arg;
 689 }
 690
 691 void _pthread_cleanup_pop(struct _pthread_cleanup_buffer *buffer, int execute)
 692 {
 693   if (execute) (*(((wine_cleanup)buffer)->routine))(((wine_cleanup)buffer)->arg);
 694 }
 695
 696 void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 697 {
 698   _pthread_cleanup_push(buffer, routine, arg);
 699 }
 700
 701 void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer *buffer, int execute)
 702 {
 703   _pthread_cleanup_pop(buffer, execute);
 704 }
 705
 706 void __pthread_cleanup_upto(jmp_buf target, char *frame)
 707 {
 708     /* FIXME */
 709 }
 710
 711 /***** CONDITIONS *****/
 712
 713 int __pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
 714 {
 715     if (!funcs.ptr_pthread_cond_init) return 0;
 716     return funcs.ptr_pthread_cond_init(cond, cond_attr);
 717 }
 718 strong_alias(__pthread_cond_init, pthread_cond_init);
 719
 720 int __pthread_cond_destroy(pthread_cond_t *cond)
 721 {
 722     if (!funcs.ptr_pthread_cond_destroy) return 0;
 723     return funcs.ptr_pthread_cond_destroy(cond);
 724 }
 725 strong_alias(__pthread_cond_destroy, pthread_cond_destroy);
 726
 727 int __pthread_cond_signal(pthread_cond_t *cond)
 728 {
 729     if (!funcs.ptr_pthread_cond_signal) return 0;
 730     return funcs.ptr_pthread_cond_signal(cond);
 731 }
 732 strong_alias(__pthread_cond_signal, pthread_cond_signal);
 733
 734 int __pthread_cond_broadcast(pthread_cond_t *cond)
 735 {
 736     if (!funcs.ptr_pthread_cond_broadcast) return 0;
 737     return funcs.ptr_pthread_cond_broadcast(cond);
 738 }
 739 strong_alias(__pthread_cond_broadcast, pthread_cond_broadcast);
 740
 741 int __pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
 742 {
 743     if (!funcs.ptr_pthread_cond_wait) return 0;
 744     return funcs.ptr_pthread_cond_wait(cond, mutex);
 745 }
 746 strong_alias(__pthread_cond_wait, pthread_cond_wait);
 747
 748 int __pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
 749 {
 750     if (!funcs.ptr_pthread_cond_timedwait) return 0;
 751     return funcs.ptr_pthread_cond_timedwait(cond, mutex, abstime);
 752 }
 753 strong_alias(__pthread_cond_timedwait, pthread_cond_timedwait);
 754
 755 /**** CONDITION ATTRIBUTES *****/
 756 /* not implemented right now */
 757
 758 int pthread_condattr_init(pthread_condattr_t *attr)
 759 {
 760   return 0;
 761 }
 762
 763 int pthread_condattr_destroy(pthread_condattr_t *attr)
 764 {
 765   return 0;
 766 }
 767
 768 /***** READ-WRITE LOCKS *****/
 769
 770 int __pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *rwlock_attr)
 771 {
 772     assert( funcs.ptr_pthread_rwlock_init );
 773     return funcs.ptr_pthread_rwlock_init( rwlock, rwlock_attr );
 774 }
 775 strong_alias(__pthread_rwlock_init, pthread_rwlock_init);
 776
 777 int __pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
 778 {
 779     assert( funcs.ptr_pthread_rwlock_destroy );
 780     return funcs.ptr_pthread_rwlock_destroy( rwlock );
 781 }
 782 strong_alias(__pthread_rwlock_destroy, pthread_rwlock_destroy);
 783
 784 int __pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 785 {
 786     if (!funcs.ptr_pthread_rwlock_rdlock) return 0;
 787     return funcs.ptr_pthread_rwlock_rdlock( rwlock );
 788 }
 789 strong_alias(__pthread_rwlock_rdlock, pthread_rwlock_rdlock);
 790
 791 int __pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 792 {
 793     assert( funcs.ptr_pthread_rwlock_tryrdlock );
 794     return funcs.ptr_pthread_rwlock_tryrdlock( rwlock );
 795 }
 796 strong_alias(__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock);
 797
 798 int __pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 799 {
 800     assert( funcs.ptr_pthread_rwlock_wrlock );
 801     return funcs.ptr_pthread_rwlock_wrlock( rwlock );
 802 }
 803 strong_alias(__pthread_rwlock_wrlock, pthread_rwlock_wrlock);
 804
 805 int __pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 806 {
 807     assert( funcs.ptr_pthread_rwlock_trywrlock );
 808     return funcs.ptr_pthread_rwlock_trywrlock( rwlock );
 809 }
 810 strong_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock);
 811
 812 int __pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
 813 {
 814     if (!funcs.ptr_pthread_rwlock_unlock) return 0;
 815     return funcs.ptr_pthread_rwlock_unlock( rwlock );
 816 }
 817 strong_alias(__pthread_rwlock_unlock, pthread_rwlock_unlock);
 818
 819 /**** READ-WRITE LOCK ATTRIBUTES *****/
 820 /* not implemented right now */
 821
 822 int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
 823 {
 824   return 0;
 825 }
 826
 827 int __pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
 828 {
 829   return 0;
 830 }
 831 strong_alias(__pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
 832
 833 int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t *attr, int *pref)
 834 {
 835   *pref = 0;
 836   return 0;
 837 }
 838
 839 int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t *attr, int pref)
 840 {
 841   return 0;
 842 }
 843
 844 /***** MISC *****/
 845
 846 pthread_t pthread_self(void)
 847 {
 848     assert( funcs.ptr_pthread_self );
 849     return funcs.ptr_pthread_self();
 850 }
 851
 852 int pthread_equal(pthread_t thread1, pthread_t thread2)
 853 {
 854     assert( funcs.ptr_pthread_equal );
 855     return funcs.ptr_pthread_equal( thread1, thread2 );
 856 }
 857
 858 void __pthread_do_exit(void *retval, char *currentframe)
 859 {
 860     assert( funcs.ptr_pthread_exit );
 861     return funcs.ptr_pthread_exit( retval, currentframe );
 862 }
 863
 864 void __pthread_exit(void *retval)
 865 {
 866     __pthread_do_exit( retval, NULL );
 867 }
 868 strong_alias(__pthread_exit, pthread_exit);
 869
 870 int pthread_setcancelstate(int state, int *oldstate)
 871 {
 872     pthread_descr descr = __pthread_thread_self();
 873     if (oldstate) *oldstate = descr->cancel_state;
 874     descr->cancel_state = state;
 875     return 0;
 876 }
 877
 878 int pthread_setcanceltype(int type, int *oldtype)
 879 {
 880     pthread_descr descr = __pthread_thread_self();
 881     if (oldtype) *oldtype = descr->cancel_type;
 882     descr->cancel_type = type;
 883     return 0;
 884 }
 885
 886 /***** ANTI-OVERRIDES *****/
 887 /* pthreads tries to override these, point them back to libc */
 888
 889 int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 890 {
 891     if (!libc_sigaction)
 892     {
 893         libc_sigaction = wine_dlsym( RTLD_NEXT, "sigaction", NULL, 0 );
 894         assert( libc_sigaction );
 895     }
 896     return libc_sigaction(signum, act, oldact);
 897 }
 898
 899 void __pthread_initialize(void)
 900 {
 901     static int done;
 902
 903     if (!done)
 904     {
 905         done = 1;
 906         /* check for exported epoll_create to detect glibc versions that we cannot support */
 907         if (wine_dlsym( RTLD_DEFAULT, "epoll_create", NULL, 0 ))
 908         {
 909             static const char warning[] =
 910                 "wine: glibc >= 2.3 without NPTL or TLS is not a supported combination.\n"
 911                 "      It will most likely crash. Please upgrade to a glibc with NPTL support.\n";
 912             write( 2, warning, sizeof(warning)-1 );
 913         }
 914         libc_fork = wine_dlsym( RTLD_NEXT, "fork", NULL, 0 );
 915         libc_sigaction = wine_dlsym( RTLD_NEXT, "sigaction", NULL, 0 );
 916         libc_uselocale = wine_dlsym( RTLD_DEFAULT, "uselocale", NULL, 0 );
 917         libc_pthread_init = wine_dlsym( RTLD_NEXT, "__libc_pthread_init", NULL, 0 );
 918         if (libc_pthread_init) libc_multiple_threads = libc_pthread_init( &libc_pthread_functions );
 919     }
 920 }
 921
 922 #ifdef __GNUC__
 923 static void init(void) __attribute__((constructor));
 924 static void init(void)
 925 {
 926     __pthread_initialize();
 927 }
 928 #endif
 929
 930 static struct pthread_functions libc_pthread_functions =
 931 {
 932     NULL,                          /* ptr_pthread_fork */
 933     NULL, /* FIXME */              /* ptr_pthread_attr_destroy */
 934     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_0 */
 935     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_1 */
 936     NULL, /* FIXME */              /* ptr_pthread_attr_getdetachstate */
 937     NULL, /* FIXME */              /* ptr_pthread_attr_setdetachstate */
 938     NULL, /* FIXME */              /* ptr_pthread_attr_getinheritsched */
 939     NULL, /* FIXME */              /* ptr_pthread_attr_setinheritsched */
 940     NULL, /* FIXME */              /* ptr_pthread_attr_getschedparam */
 941     pthread_attr_setschedparam,    /* ptr_pthread_attr_setschedparam */
 942     NULL, /* FIXME */              /* ptr_pthread_attr_getschedpolicy */
 943     NULL, /* FIXME */              /* ptr_pthread_attr_setschedpolicy */
 944     NULL, /* FIXME */              /* ptr_pthread_attr_getscope */
 945     NULL, /* FIXME */              /* ptr_pthread_attr_setscope */
 946     pthread_condattr_destroy,      /* ptr_pthread_condattr_destroy */
 947     pthread_condattr_init,         /* ptr_pthread_condattr_init */
 948     __pthread_cond_broadcast,      /* ptr___pthread_cond_broadcast */
 949     __pthread_cond_destroy,        /* ptr___pthread_cond_destroy */
 950     __pthread_cond_init,           /* ptr___pthread_cond_init */
 951     __pthread_cond_signal,         /* ptr___pthread_cond_signal */
 952     __pthread_cond_wait,           /* ptr___pthread_cond_wait */
 953     pthread_equal,                 /* ptr_pthread_equal */
 954     __pthread_exit,                /* ptr___pthread_exit */
 955     NULL, /* FIXME */              /* ptr_pthread_getschedparam */
 956     NULL, /* FIXME */              /* ptr_pthread_setschedparam */
 957     __pthread_mutex_destroy,       /* ptr_pthread_mutex_destroy */
 958     __pthread_mutex_init,          /* ptr_pthread_mutex_init */
 959     __pthread_mutex_lock,          /* ptr_pthread_mutex_lock */
 960     __pthread_mutex_trylock,       /* ptr_pthread_mutex_trylock */
 961     __pthread_mutex_unlock,        /* ptr_pthread_mutex_unlock */
 962     pthread_self,                  /* ptr_pthread_self */
 963     pthread_setcancelstate,        /* ptr_pthread_setcancelstate */
 964     pthread_setcanceltype,         /* ptr_pthread_setcanceltype */
 965     __pthread_do_exit,             /* ptr_pthread_do_exit */
 966     __pthread_cleanup_upto,        /* ptr_pthread_cleanup_upto */
 967     __pthread_thread_self,         /* ptr_pthread_thread_self */
 968     pthread_internal_tsd_set,      /* ptr_pthread_internal_tsd_set */
 969     pthread_internal_tsd_get,      /* ptr_pthread_internal_tsd_get */
 970     pthread_internal_tsd_address,  /* ptr_pthread_internal_tsd_address */
 971     NULL,                          /* ptr_pthread_sigaction */
 972     NULL,                          /* ptr_pthread_sigwait */
 973     NULL,                          /* ptr_pthread_raise */
 974     __pthread_cond_timedwait,      /* ptr___pthread_cond_timedwait */
 975     _pthread_cleanup_push,         /* ptr__pthread_cleanup_push */
 976     _pthread_cleanup_pop           /* ptr__pthread_cleanup_pop */
 977 };
 978
 979 #endif /* HAVE_PTHREAD_H && (__GLIBC__ || __FREEBSD__) */