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_VALGRIND_H
  56 #include <valgrind/valgrind.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 VALGRIND_DISCARD_TRANSLATIONS
 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 static 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 void init_pthread_functions(void)
 340 {
 341     wine_pthread_set_functions( &pthread_functions, sizeof(pthread_functions) );
 342 }
 343
 344 /* Currently this probably works only for glibc2,
 345  * which checks for the presence of double-underscore-prepended
 346  * pthread primitives, and use them if available.
 347  * If they are not available, the libc defaults to
 348  * non-threadsafe operation (not good). */
 349
 350 #if defined(HAVE_PTHREAD_H) && (defined(__GLIBC__) || defined(__FreeBSD__))
 351
 352 /* adapt as necessary (a construct like this is used in glibc sources) */
 353 #define strong_alias(orig, alias) \
 354  asm(".globl " PSTR(alias) "\n" \
 355      "\t.set " PSTR(alias) "," PSTR(orig))
 356
 357 struct fork_block;
 358
 359 /* pthread functions redirection */
 360
 361 struct pthread_functions
 362 {
 363   pid_t (*ptr_pthread_fork) (struct fork_block *);
 364   int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
 365   int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
 366   int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
 367   int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
 368   int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
 369   int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
 370   int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
 371   int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *, struct sched_param *);
 372   int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *, const struct sched_param *);
 373   int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
 374   int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
 375   int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
 376   int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
 377   int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
 378   int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
 379   int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
 380   int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
 381   int (*ptr___pthread_cond_init) (pthread_cond_t *, const pthread_condattr_t *);
 382   int (*ptr___pthread_cond_signal) (pthread_cond_t *);
 383   int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
 384   int (*ptr_pthread_equal) (pthread_t, pthread_t);
 385   void (*ptr___pthread_exit) (void *);
 386   int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
 387   int (*ptr_pthread_setschedparam) (pthread_t, int, const struct sched_param *);
 388   int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
 389   int (*ptr_pthread_mutex_init) (pthread_mutex_t *, const pthread_mutexattr_t *);
 390   int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
 391   int (*ptr_pthread_mutex_trylock) (pthread_mutex_t *);
 392   int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
 393   pthread_t (*ptr_pthread_self) (void);
 394   int (*ptr_pthread_setcancelstate) (int, int *);
 395   int (*ptr_pthread_setcanceltype) (int, int *);
 396   void (*ptr_pthread_do_exit) (void *retval, char *currentframe);
 397   void (*ptr_pthread_cleanup_upto) (jmp_buf target, char *targetframe);
 398   pthread_descr (*ptr_pthread_thread_self) (void);
 399   int (*ptr_pthread_internal_tsd_set) (int key, const void *pointer);
 400   void * (*ptr_pthread_internal_tsd_get) (int key);
 401   void ** __attribute__ ((__const__)) (*ptr_pthread_internal_tsd_address) (int key);
 402   int (*ptr_pthread_sigaction) (int sig, const struct sigaction * act, struct sigaction *oact);
 403   int (*ptr_pthread_sigwait) (const sigset_t *set, int *sig);
 404   int (*ptr_pthread_raise) (int sig);
 405   int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *, const struct timespec *);
 406   void (*ptr__pthread_cleanup_push) (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg);
 407   void (*ptr__pthread_cleanup_pop) (struct _pthread_cleanup_buffer * buffer, int execute);
 408 };
 409
 410 static pid_t (*libc_fork)(void);
 411 static int (*libc_sigaction)(int signum, const struct sigaction *act, struct sigaction *oldact);
 412 static int *(*libc_pthread_init)( const struct pthread_functions *funcs );
 413
 414 static struct pthread_functions libc_pthread_functions;
 415
 416 strong_alias(__pthread_thread_self, pthread_thread_self);
 417
 418 /* redefine this to prevent libpthread from overriding our function pointers */
 419 int *__libc_pthread_init( const struct pthread_functions *funcs )
 420 {
 421     return libc_multiple_threads;
 422 }
 423
 424 typedef struct _wine_cleanup {
 425   void (*routine)(void *);
 426   void *arg;
 427 } *wine_cleanup;
 428
 429 int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void*
 430         (*start_routine)(void *), void* arg)
 431 {
 432     assert( funcs.ptr_pthread_create );
 433     return funcs.ptr_pthread_create( thread, attr, start_routine, arg );
 434 }
 435
 436 int pthread_cancel(pthread_t thread)
 437 {
 438     assert( funcs.ptr_pthread_cancel );
 439     return funcs.ptr_pthread_cancel( thread );
 440 }
 441
 442 int pthread_join(pthread_t thread, void **value_ptr)
 443 {
 444     assert( funcs.ptr_pthread_join );
 445     return funcs.ptr_pthread_join( thread, value_ptr );
 446 }
 447
 448 int pthread_detach(pthread_t thread)
 449 {
 450     assert( funcs.ptr_pthread_detach );
 451     return funcs.ptr_pthread_detach( thread );
 452 }
 453
 454 /* FIXME: we have no equivalents in win32 for the policys */
 455 /* so just keep this as a stub */
 456 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
 457 {
 458   P_OUTPUT("FIXME:pthread_attr_setschedpolicy\n");
 459   return 0;
 460 }
 461
 462 /* FIXME: no win32 equivalent for scope */
 463 int pthread_attr_setscope(pthread_attr_t *attr, int scope)
 464 {
 465   P_OUTPUT("FIXME:pthread_attr_setscope\n");
 466   return 0; /* return success */
 467 }
 468
 469 /* FIXME: no win32 equivalent for schedule param */
 470 int pthread_attr_setschedparam(pthread_attr_t *attr,
 471     const struct sched_param *param)
 472 {
 473   P_OUTPUT("FIXME:pthread_attr_setschedparam\n");
 474   return 0; /* return success */
 475 }
 476
 477 /* FIXME */
 478 int pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
 479 {
 480   return 0; /* return success */
 481 }
 482
 483 int __pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
 484 {
 485     static pthread_once_t the_once = PTHREAD_ONCE_INIT;
 486     int once_now;
 487
 488     memcpy(&once_now,&the_once,sizeof(once_now));
 489     if (interlocked_cmpxchg((int*)once_control, once_now+1, once_now) == once_now)
 490         (*init_routine)();
 491     return 0;
 492 }
 493 strong_alias(__pthread_once, pthread_once);
 494
 495 void __pthread_kill_other_threads_np(void)
 496 {
 497     /* we don't need to do anything here */
 498 }
 499 strong_alias(__pthread_kill_other_threads_np, pthread_kill_other_threads_np);
 500
 501 /***** atfork *****/
 502
 503 #define MAX_ATFORK 8  /* libc doesn't need that many anyway */
 504
 505 static pthread_mutex_t atfork_mutex = PTHREAD_MUTEX_INITIALIZER;
 506
 507 typedef void (*atfork_handler)(void);
 508 static atfork_handler atfork_prepare[MAX_ATFORK];
 509 static atfork_handler atfork_parent[MAX_ATFORK];
 510 static atfork_handler atfork_child[MAX_ATFORK];
 511 static int atfork_count;
 512
 513 int __pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
 514 {
 515     pthread_mutex_lock( &atfork_mutex );
 516     assert( atfork_count < MAX_ATFORK );
 517     atfork_prepare[atfork_count] = prepare;
 518     atfork_parent[atfork_count] = parent;
 519     atfork_child[atfork_count] = child;
 520     atfork_count++;
 521     pthread_mutex_unlock( &atfork_mutex );
 522     return 0;
 523 }
 524 strong_alias(__pthread_atfork, pthread_atfork);
 525
 526 pid_t __fork(void)
 527 {
 528     pid_t pid;
 529     int i;
 530
 531     if (!libc_fork)
 532     {
 533         libc_fork = wine_dlsym( RTLD_NEXT, "fork", NULL, 0 );
 534         assert( libc_fork );
 535     }
 536     pthread_mutex_lock( &atfork_mutex );
 537     /* prepare handlers are called in reverse insertion order */
 538     for (i = atfork_count - 1; i >= 0; i--) if (atfork_prepare[i]) atfork_prepare[i]();
 539     if (!(pid = libc_fork()))
 540     {
 541         pthread_mutex_init( &atfork_mutex, NULL );
 542         for (i = 0; i < atfork_count; i++) if (atfork_child[i]) atfork_child[i]();
 543     }
 544     else
 545     {
 546         for (i = 0; i < atfork_count; i++) if (atfork_parent[i]) atfork_parent[i]();
 547         pthread_mutex_unlock( &atfork_mutex );
 548     }
 549     return pid;
 550 }
 551 strong_alias(__fork, fork);
 552
 553 /***** MUTEXES *****/
 554
 555 int __pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr)
 556 {
 557     if (!funcs.ptr_pthread_mutex_init) return 0;
 558     return funcs.ptr_pthread_mutex_init( mutex, mutexattr );
 559 }
 560 strong_alias(__pthread_mutex_init, pthread_mutex_init);
 561
 562 int __pthread_mutex_lock(pthread_mutex_t *mutex)
 563 {
 564     if (!funcs.ptr_pthread_mutex_lock) return 0;
 565     return funcs.ptr_pthread_mutex_lock( mutex );
 566 }
 567 strong_alias(__pthread_mutex_lock, pthread_mutex_lock);
 568
 569 int __pthread_mutex_trylock(pthread_mutex_t *mutex)
 570 {
 571     if (!funcs.ptr_pthread_mutex_trylock) return 0;
 572     return funcs.ptr_pthread_mutex_trylock( mutex );
 573 }
 574 strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock);
 575
 576 int __pthread_mutex_unlock(pthread_mutex_t *mutex)
 577 {
 578     if (!funcs.ptr_pthread_mutex_unlock) return 0;
 579     return funcs.ptr_pthread_mutex_unlock( mutex );
 580 }
 581 strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
 582
 583 int __pthread_mutex_destroy(pthread_mutex_t *mutex)
 584 {
 585     if (!funcs.ptr_pthread_mutex_destroy) return 0;
 586     return funcs.ptr_pthread_mutex_destroy( mutex );
 587 }
 588 strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy);
 589
 590
 591 /***** MUTEX ATTRIBUTES *****/
 592 /* just dummies, since critical sections are always recursive */
 593
 594 int __pthread_mutexattr_init(pthread_mutexattr_t *attr)
 595 {
 596   return 0;
 597 }
 598 strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init);
 599
 600 int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
 601 {
 602   return 0;
 603 }
 604 strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy);
 605
 606 int __pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
 607 {
 608   return 0;
 609 }
 610 strong_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
 611
 612 int __pthread_mutexattr_getkind_np(pthread_mutexattr_t *attr, int *kind)
 613 {
 614   *kind = PTHREAD_MUTEX_RECURSIVE;
 615   return 0;
 616 }
 617 strong_alias(__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
 618
 619 int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind)
 620 {
 621   return 0;
 622 }
 623 strong_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype);
 624
 625 int __pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *kind)
 626 {
 627   *kind = PTHREAD_MUTEX_RECURSIVE;
 628   return 0;
 629 }
 630 strong_alias(__pthread_mutexattr_gettype, pthread_mutexattr_gettype);
 631
 632
 633 /***** THREAD-SPECIFIC VARIABLES (KEYS) *****/
 634
 635 int __pthread_key_create(pthread_key_t *key, void (*destr_function)(void *))
 636 {
 637     static int keycnt = FIRST_KEY;
 638     *key = interlocked_xchg_add(&keycnt, 1);
 639     return 0;
 640 }
 641 strong_alias(__pthread_key_create, pthread_key_create);
 642
 643 int __pthread_key_delete(pthread_key_t key)
 644 {
 645   return 0;
 646 }
 647 strong_alias(__pthread_key_delete, pthread_key_delete);
 648
 649 int __pthread_setspecific(pthread_key_t key, const void *pointer)
 650 {
 651     pthread_descr descr = __pthread_thread_self();
 652     descr->key_data[key] = pointer;
 653     return 0;
 654 }
 655 strong_alias(__pthread_setspecific, pthread_setspecific);
 656
 657 void *__pthread_getspecific(pthread_key_t key)
 658 {
 659     pthread_descr descr = __pthread_thread_self();
 660     return (void *)descr->key_data[key];
 661 }
 662 strong_alias(__pthread_getspecific, pthread_getspecific);
 663
 664 static int pthread_internal_tsd_set( int key, const void *pointer )
 665 {
 666     pthread_descr descr = __pthread_thread_self();
 667     descr->tsd_data[key] = pointer;
 668     return 0;
 669 }
 670 int (*__libc_internal_tsd_set)(int, const void *) = pthread_internal_tsd_set;
 671
 672 static void *pthread_internal_tsd_get( int key )
 673 {
 674     pthread_descr descr = __pthread_thread_self();
 675     return (void *)descr->tsd_data[key];
 676 }
 677 void* (*__libc_internal_tsd_get)(int) = pthread_internal_tsd_get;
 678
 679 static void ** __attribute__((const)) pthread_internal_tsd_address( int key )
 680 {
 681     pthread_descr descr = __pthread_thread_self();
 682     return (void **)&descr->tsd_data[key];
 683 }
 684 void** (*__libc_internal_tsd_address)(int) = pthread_internal_tsd_address;
 685
 686 /***** "EXCEPTION" FRAMES *****/
 687 /* not implemented right now */
 688
 689 void _pthread_cleanup_push(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 690 {
 691   ((wine_cleanup)buffer)->routine = routine;
 692   ((wine_cleanup)buffer)->arg = arg;
 693 }
 694
 695 void _pthread_cleanup_pop(struct _pthread_cleanup_buffer *buffer, int execute)
 696 {
 697   if (execute) (*(((wine_cleanup)buffer)->routine))(((wine_cleanup)buffer)->arg);
 698 }
 699
 700 void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 701 {
 702   _pthread_cleanup_push(buffer, routine, arg);
 703 }
 704
 705 void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer *buffer, int execute)
 706 {
 707   _pthread_cleanup_pop(buffer, execute);
 708 }
 709
 710 void __pthread_cleanup_upto(jmp_buf target, char *frame)
 711 {
 712     /* FIXME */
 713 }
 714
 715 /***** CONDITIONS *****/
 716
 717 int __pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
 718 {
 719     if (!funcs.ptr_pthread_cond_init) return 0;
 720     return funcs.ptr_pthread_cond_init(cond, cond_attr);
 721 }
 722 strong_alias(__pthread_cond_init, pthread_cond_init);
 723
 724 int __pthread_cond_destroy(pthread_cond_t *cond)
 725 {
 726     if (!funcs.ptr_pthread_cond_destroy) return 0;
 727     return funcs.ptr_pthread_cond_destroy(cond);
 728 }
 729 strong_alias(__pthread_cond_destroy, pthread_cond_destroy);
 730
 731 int __pthread_cond_signal(pthread_cond_t *cond)
 732 {
 733     if (!funcs.ptr_pthread_cond_signal) return 0;
 734     return funcs.ptr_pthread_cond_signal(cond);
 735 }
 736 strong_alias(__pthread_cond_signal, pthread_cond_signal);
 737
 738 int __pthread_cond_broadcast(pthread_cond_t *cond)
 739 {
 740     if (!funcs.ptr_pthread_cond_broadcast) return 0;
 741     return funcs.ptr_pthread_cond_broadcast(cond);
 742 }
 743 strong_alias(__pthread_cond_broadcast, pthread_cond_broadcast);
 744
 745 int __pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
 746 {
 747     if (!funcs.ptr_pthread_cond_wait) return 0;
 748     return funcs.ptr_pthread_cond_wait(cond, mutex);
 749 }
 750 strong_alias(__pthread_cond_wait, pthread_cond_wait);
 751
 752 int __pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
 753 {
 754     if (!funcs.ptr_pthread_cond_timedwait) return 0;
 755     return funcs.ptr_pthread_cond_timedwait(cond, mutex, abstime);
 756 }
 757 strong_alias(__pthread_cond_timedwait, pthread_cond_timedwait);
 758
 759 /**** CONDITION ATTRIBUTES *****/
 760 /* not implemented right now */
 761
 762 int pthread_condattr_init(pthread_condattr_t *attr)
 763 {
 764   return 0;
 765 }
 766
 767 int pthread_condattr_destroy(pthread_condattr_t *attr)
 768 {
 769   return 0;
 770 }
 771
 772 /***** READ-WRITE LOCKS *****/
 773
 774 int __pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *rwlock_attr)
 775 {
 776     assert( funcs.ptr_pthread_rwlock_init );
 777     return funcs.ptr_pthread_rwlock_init( rwlock, rwlock_attr );
 778 }
 779 strong_alias(__pthread_rwlock_init, pthread_rwlock_init);
 780
 781 int __pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
 782 {
 783     assert( funcs.ptr_pthread_rwlock_destroy );
 784     return funcs.ptr_pthread_rwlock_destroy( rwlock );
 785 }
 786 strong_alias(__pthread_rwlock_destroy, pthread_rwlock_destroy);
 787
 788 int __pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 789 {
 790     if (!funcs.ptr_pthread_rwlock_rdlock) return 0;
 791     return funcs.ptr_pthread_rwlock_rdlock( rwlock );
 792 }
 793 strong_alias(__pthread_rwlock_rdlock, pthread_rwlock_rdlock);
 794
 795 int __pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 796 {
 797     assert( funcs.ptr_pthread_rwlock_tryrdlock );
 798     return funcs.ptr_pthread_rwlock_tryrdlock( rwlock );
 799 }
 800 strong_alias(__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock);
 801
 802 int __pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 803 {
 804     assert( funcs.ptr_pthread_rwlock_wrlock );
 805     return funcs.ptr_pthread_rwlock_wrlock( rwlock );
 806 }
 807 strong_alias(__pthread_rwlock_wrlock, pthread_rwlock_wrlock);
 808
 809 int __pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 810 {
 811     assert( funcs.ptr_pthread_rwlock_trywrlock );
 812     return funcs.ptr_pthread_rwlock_trywrlock( rwlock );
 813 }
 814 strong_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock);
 815
 816 int __pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
 817 {
 818     if (!funcs.ptr_pthread_rwlock_unlock) return 0;
 819     return funcs.ptr_pthread_rwlock_unlock( rwlock );
 820 }
 821 strong_alias(__pthread_rwlock_unlock, pthread_rwlock_unlock);
 822
 823 /**** READ-WRITE LOCK ATTRIBUTES *****/
 824 /* not implemented right now */
 825
 826 int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
 827 {
 828   return 0;
 829 }
 830
 831 int __pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
 832 {
 833   return 0;
 834 }
 835 strong_alias(__pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
 836
 837 int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t *attr, int *pref)
 838 {
 839   *pref = 0;
 840   return 0;
 841 }
 842
 843 int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t *attr, int pref)
 844 {
 845   return 0;
 846 }
 847
 848 /***** MISC *****/
 849
 850 pthread_t pthread_self(void)
 851 {
 852     assert( funcs.ptr_pthread_self );
 853     return funcs.ptr_pthread_self();
 854 }
 855
 856 int pthread_equal(pthread_t thread1, pthread_t thread2)
 857 {
 858     assert( funcs.ptr_pthread_equal );
 859     return funcs.ptr_pthread_equal( thread1, thread2 );
 860 }
 861
 862 void __pthread_do_exit(void *retval, char *currentframe)
 863 {
 864     assert( funcs.ptr_pthread_exit );
 865     return funcs.ptr_pthread_exit( retval, currentframe );
 866 }
 867
 868 void __pthread_exit(void *retval)
 869 {
 870     __pthread_do_exit( retval, NULL );
 871 }
 872 strong_alias(__pthread_exit, pthread_exit);
 873
 874 int pthread_setcancelstate(int state, int *oldstate)
 875 {
 876     pthread_descr descr = __pthread_thread_self();
 877     if (oldstate) *oldstate = descr->cancel_state;
 878     descr->cancel_state = state;
 879     return 0;
 880 }
 881
 882 int pthread_setcanceltype(int type, int *oldtype)
 883 {
 884     pthread_descr descr = __pthread_thread_self();
 885     if (oldtype) *oldtype = descr->cancel_type;
 886     descr->cancel_type = type;
 887     return 0;
 888 }
 889
 890 /***** ANTI-OVERRIDES *****/
 891 /* pthreads tries to override these, point them back to libc */
 892
 893 int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 894 {
 895     if (!libc_sigaction)
 896     {
 897         libc_sigaction = wine_dlsym( RTLD_NEXT, "sigaction", NULL, 0 );
 898         assert( libc_sigaction );
 899     }
 900     return libc_sigaction(signum, act, oldact);
 901 }
 902
 903 void __pthread_initialize(void)
 904 {
 905     static int done;
 906
 907     if (!done)
 908     {
 909         done = 1;
 910         /* check for exported epoll_create to detect glibc versions that we cannot support */
 911         if (wine_dlsym( RTLD_DEFAULT, "epoll_create", NULL, 0 ))
 912         {
 913             static const char warning[] =
 914                 "wine: glibc >= 2.3 without NPTL or TLS is not a supported combination.\n"
 915                 "      It will most likely crash. Please upgrade to a glibc with NPTL support.\n";
 916             write( 2, warning, sizeof(warning)-1 );
 917         }
 918         libc_fork = wine_dlsym( RTLD_NEXT, "fork", NULL, 0 );
 919         libc_sigaction = wine_dlsym( RTLD_NEXT, "sigaction", NULL, 0 );
 920         libc_uselocale = wine_dlsym( RTLD_DEFAULT, "uselocale", NULL, 0 );
 921         libc_pthread_init = wine_dlsym( RTLD_NEXT, "__libc_pthread_init", NULL, 0 );
 922         if (libc_pthread_init) libc_multiple_threads = libc_pthread_init( &libc_pthread_functions );
 923     }
 924 }
 925
 926 #ifdef __GNUC__
 927 static void init(void) __attribute__((constructor));
 928 static void init(void)
 929 {
 930     __pthread_initialize();
 931 }
 932 #endif
 933
 934 static struct pthread_functions libc_pthread_functions =
 935 {
 936     NULL,                          /* ptr_pthread_fork */
 937     NULL, /* FIXME */              /* ptr_pthread_attr_destroy */
 938     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_0 */
 939     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_1 */
 940     NULL, /* FIXME */              /* ptr_pthread_attr_getdetachstate */
 941     NULL, /* FIXME */              /* ptr_pthread_attr_setdetachstate */
 942     NULL, /* FIXME */              /* ptr_pthread_attr_getinheritsched */
 943     NULL, /* FIXME */              /* ptr_pthread_attr_setinheritsched */
 944     NULL, /* FIXME */              /* ptr_pthread_attr_getschedparam */
 945     pthread_attr_setschedparam,    /* ptr_pthread_attr_setschedparam */
 946     NULL, /* FIXME */              /* ptr_pthread_attr_getschedpolicy */
 947     NULL, /* FIXME */              /* ptr_pthread_attr_setschedpolicy */
 948     NULL, /* FIXME */              /* ptr_pthread_attr_getscope */
 949     NULL, /* FIXME */              /* ptr_pthread_attr_setscope */
 950     pthread_condattr_destroy,      /* ptr_pthread_condattr_destroy */
 951     pthread_condattr_init,         /* ptr_pthread_condattr_init */
 952     __pthread_cond_broadcast,      /* ptr___pthread_cond_broadcast */
 953     __pthread_cond_destroy,        /* ptr___pthread_cond_destroy */
 954     __pthread_cond_init,           /* ptr___pthread_cond_init */
 955     __pthread_cond_signal,         /* ptr___pthread_cond_signal */
 956     __pthread_cond_wait,           /* ptr___pthread_cond_wait */
 957     pthread_equal,                 /* ptr_pthread_equal */
 958     __pthread_exit,                /* ptr___pthread_exit */
 959     NULL, /* FIXME */              /* ptr_pthread_getschedparam */
 960     NULL, /* FIXME */              /* ptr_pthread_setschedparam */
 961     __pthread_mutex_destroy,       /* ptr_pthread_mutex_destroy */
 962     __pthread_mutex_init,          /* ptr_pthread_mutex_init */
 963     __pthread_mutex_lock,          /* ptr_pthread_mutex_lock */
 964     __pthread_mutex_trylock,       /* ptr_pthread_mutex_trylock */
 965     __pthread_mutex_unlock,        /* ptr_pthread_mutex_unlock */
 966     pthread_self,                  /* ptr_pthread_self */
 967     pthread_setcancelstate,        /* ptr_pthread_setcancelstate */
 968     pthread_setcanceltype,         /* ptr_pthread_setcanceltype */
 969     __pthread_do_exit,             /* ptr_pthread_do_exit */
 970     __pthread_cleanup_upto,        /* ptr_pthread_cleanup_upto */
 971     __pthread_thread_self,         /* ptr_pthread_thread_self */
 972     pthread_internal_tsd_set,      /* ptr_pthread_internal_tsd_set */
 973     pthread_internal_tsd_get,      /* ptr_pthread_internal_tsd_get */
 974     pthread_internal_tsd_address,  /* ptr_pthread_internal_tsd_address */
 975     NULL,                          /* ptr_pthread_sigaction */
 976     NULL,                          /* ptr_pthread_sigwait */
 977     NULL,                          /* ptr_pthread_raise */
 978     __pthread_cond_timedwait,      /* ptr___pthread_cond_timedwait */
 979     _pthread_cleanup_push,         /* ptr__pthread_cleanup_push */
 980     _pthread_cleanup_pop           /* ptr__pthread_cleanup_pop */
 981 };
 982
 983 #endif /* HAVE_PTHREAD_H && (__GLIBC__ || __FREEBSD__) */