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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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_SYS_LWP_H
  62 # include <sys/lwp.h>
  63 #endif
  64 #ifdef HAVE_UCONTEXT_H
  65 # include <ucontext.h>
  66 #endif
  67 #ifdef HAVE_SCHED_H
  68 #include <sched.h>
  69 #endif
  70
  71 #include "wine/library.h"
  72 #include "wine/pthread.h"
  73
  74 #define P_OUTPUT(stuff) write(2,stuff,strlen(stuff))
  75
  76 #define PSTR(str) __ASM_NAME(#str)
  77
  78 static struct wine_pthread_functions funcs;
  79
  80 /* thread descriptor */
  81
  82 #define FIRST_KEY 0
  83 #define MAX_KEYS 16 /* libc6 doesn't use that many, but... */
  84 #define MAX_TSD  16
  85
  86 struct pthread_descr_struct
  87 {
  88     char               dummy[2048];
  89     int                thread_errno;
  90     int                thread_h_errno;
  91     int                cancel_state;
  92     int                cancel_type;
  93     struct __res_state res_state;
  94     const void        *key_data[MAX_KEYS];  /* for normal pthread keys */
  95     const void        *tsd_data[MAX_TSD];   /* for libc internal tsd variables */
  96 };
  97
  98 typedef struct pthread_descr_struct *pthread_descr;
  99
 100 static struct pthread_descr_struct initial_descr;
 101
 102 pthread_descr __pthread_thread_self(void)
 103 {
 104     struct pthread_descr_struct *descr;
 105     if (!funcs.ptr_get_thread_data) return &initial_descr;
 106     descr = funcs.ptr_get_thread_data();
 107     if (!descr) return &initial_descr;
 108     return descr;
 109 }
 110
 111 static int (*libc_uselocale)(int set);
 112 static int *libc_multiple_threads;
 113
 114 /***********************************************************************
 115  *           __errno_location/__error/__errno/___errno/__thr_errno
 116  *
 117  * Get the per-thread errno location.
 118  */
 119 int *__errno_location(void)                            /* Linux */
 120 {
 121     pthread_descr descr = __pthread_thread_self();
 122     return &descr->thread_errno;
 123 }
 124 int *__error(void)     { return __errno_location(); }  /* FreeBSD */
 125 int *__errno(void)     { return __errno_location(); }  /* NetBSD */
 126 int *___errno(void)    { return __errno_location(); }  /* Solaris */
 127 int *__thr_errno(void) { return __errno_location(); }  /* UnixWare */
 128
 129 /***********************************************************************
 130  *           __h_errno_location
 131  *
 132  * Get the per-thread h_errno location.
 133  */
 134 int *__h_errno_location(void)
 135 {
 136     pthread_descr descr = __pthread_thread_self();
 137     return &descr->thread_h_errno;
 138 }
 139
 140 struct __res_state *__res_state(void)
 141 {
 142     pthread_descr descr = __pthread_thread_self();
 143     return &descr->res_state;
 144 }
 145
 146 static inline void writejump( const char *symbol, void *dest )
 147 {
 148 #if defined(__GLIBC__) && defined(__i386__)
 149     unsigned char *addr = dlsym( RTLD_NEXT, symbol );
 150
 151     if (!addr) return;
 152
 153     /* write a relative jump at the function address */
 154     mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC|PROT_WRITE);
 155     addr[0] = 0xe9;
 156     *(int *)(addr+1) = (unsigned char *)dest - (addr + 5);
 157     mprotect((void*)((unsigned int)addr & ~(getpagesize()-1)), 5, PROT_READ|PROT_EXEC);
 158
 159 # ifdef HAVE_VALGRIND_MEMCHECK_H
 160     VALGRIND_DISCARD_TRANSLATIONS( addr, 5 );
 161 # endif
 162 #endif  /* __GLIBC__ && __i386__ */
 163 }
 164
 165 /* temporary stacks used on thread exit */
 166 #define TEMP_STACK_SIZE 1024
 167 #define NB_TEMP_STACKS  8
 168 static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
 169 static LONG next_temp_stack;  /* next temp stack to use */
 170
 171 /***********************************************************************
 172  *           get_temp_stack
 173  *
 174  * Get a temporary stack address to run the thread exit code on.
 175  */
 176 inline static char *get_temp_stack(void)
 177 {
 178     unsigned int next = interlocked_xchg_add( &next_temp_stack, 1 );
 179     return temp_stacks[next % NB_TEMP_STACKS] + TEMP_STACK_SIZE;
 180 }
 181
 182
 183 /***********************************************************************
 184  *           cleanup_thread
 185  *
 186  * Cleanup the remains of a thread. Runs on a temporary stack.
 187  */
 188 static void cleanup_thread( void *ptr )
 189 {
 190     /* copy the info structure since it is on the stack we will free */
 191     struct wine_pthread_thread_info info = *(struct wine_pthread_thread_info *)ptr;
 192     wine_ldt_free_fs( info.teb_sel );
 193     munmap( info.stack_base, info.stack_size );
 194     munmap( info.teb_base, info.teb_size );
 195 #ifdef HAVE__LWP_CREATE
 196     _lwp_exit();
 197 #endif
 198     _exit( info.exit_status );
 199 }
 200
 201
 202 /***********************************************************************
 203  *           wine_pthread_init_process
 204  *
 205  * Initialization for a newly created process.
 206  */
 207 void wine_pthread_init_process( const struct wine_pthread_functions *functions )
 208 {
 209     memcpy( &funcs, functions, min(functions->size,sizeof(funcs)) );
 210     funcs.ptr_set_thread_data( &initial_descr );
 211 }
 212
 213
 214 /***********************************************************************
 215  *           wine_pthread_init_thread
 216  *
 217  * Initialization for a newly created thread.
 218  */
 219 void wine_pthread_init_thread( struct wine_pthread_thread_info *info )
 220 {
 221     struct pthread_descr_struct *descr;
 222
 223 #ifdef __i386__
 224     /* On the i386, the current thread is in the %fs register */
 225     LDT_ENTRY fs_entry;
 226
 227     wine_ldt_set_base( &fs_entry, info->teb_base );
 228     wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
 229     wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 230     wine_ldt_init_fs( info->teb_sel, &fs_entry );
 231 #elif defined(__powerpc__)
 232     /* On PowerPC, the current TEB is in the gpr13 register */
 233 # ifdef __APPLE__
 234     __asm__ __volatile__("mr r13, %0" : : "r" (info->teb_base));
 235 # else
 236     __asm__ __volatile__("mr 2, %0" : : "r" (info->teb_base));
 237 # endif
 238 #elif defined(HAVE__LWP_CREATE)
 239     /* On non-i386 Solaris, we use the LWP private pointer */
 240     _lwp_setprivate( info->teb_base );
 241 #endif
 242
 243     /* set pid and tid */
 244     info->pid = getpid();
 245 #ifdef HAVE__LWP_SELF
 246     info->tid = _lwp_self();
 247 #else
 248     info->tid = -1;
 249 #endif
 250
 251     if (funcs.ptr_set_thread_data)
 252     {
 253         descr = calloc( 1, sizeof(*descr) );
 254         funcs.ptr_set_thread_data( descr );
 255         if (libc_multiple_threads) *libc_multiple_threads = 1;
 256     }
 257     else  /* first thread */
 258     {
 259         descr = &initial_descr;
 260         writejump( "__errno_location", __errno_location );
 261         writejump( "__h_errno_location", __h_errno_location );
 262         writejump( "__res_state", __res_state );
 263     }
 264     descr->cancel_state = PTHREAD_CANCEL_ENABLE;
 265     descr->cancel_type  = PTHREAD_CANCEL_ASYNCHRONOUS;
 266     if (libc_uselocale) libc_uselocale( -1 /*LC_GLOBAL_LOCALE*/ );
 267 }
 268
 269
 270 /***********************************************************************
 271  *           wine_pthread_create_thread
 272  */
 273 int wine_pthread_create_thread( struct wine_pthread_thread_info *info )
 274 {
 275     if (!info->stack_base)
 276     {
 277         info->stack_base = wine_anon_mmap( NULL, info->stack_size,
 278                                            PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 279         if (info->stack_base == (void *)-1) return -1;
 280     }
 281 #ifdef HAVE_CLONE
 282     if (clone( (int (*)(void *))info->entry, (char *)info->stack_base + info->stack_size,
 283                CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, info ) < 0)
 284         return -1;
 285     return 0;
 286 #elif defined(HAVE_RFORK)
 287     {
 288         void **sp = (void **)((char *)info->stack_base + info->stack_size);
 289         *--sp = info;
 290         *--sp = 0;
 291         *--sp = info->entry;
 292         __asm__ __volatile__(
 293             "pushl %2;\n\t"             /* flags */
 294             "pushl $0;\n\t"             /* 0 ? */
 295             "movl %1,%%eax;\n\t"        /* SYS_rfork */
 296             ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
 297             "cmpl $0, %%edx;\n\t"
 298             "je 1f;\n\t"
 299             "movl %0,%%esp;\n\t"        /* child -> new thread */
 300             "ret;\n"
 301             "1:\n\t"                    /* parent -> caller thread */
 302             "addl $8,%%esp" :
 303             : "r" (sp), "g" (SYS_rfork), "g" (RFPROC | RFMEM | RFTHREAD)
 304             : "eax", "edx");
 305         return 0;
 306     }
 307 #elif defined(HAVE__LWP_CREATE)
 308     {
 309         ucontext_t context;
 310         _lwp_makecontext( &context, (void(*)(void *))info->entry, info,
 311                           NULL, info->stack_base, info->stack_size );
 312         if ( _lwp_create( &context, 0, NULL ) )
 313             return -1;
 314         return 0;
 315     }
 316 #endif
 317     return -1;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           wine_pthread_get_current_teb
 323  */
 324 void *wine_pthread_get_current_teb(void)
 325 {
 326     void *ret;
 327
 328 #ifdef __i386__
 329     __asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
 330 #elif defined(HAVE__LWP_CREATE)
 331     ret = _lwp_getprivate();
 332 #elif defined(__powerpc__)
 333 # ifdef __APPLE__
 334     __asm__( "mr %0,r13" : "=r" (ret) );
 335 # else
 336     __asm__( "mr %0,2" : "=r" (ret) );
 337 # endif
 338 #else
 339 # error wine_pthread_get_current_teb not defined for this architecture
 340 #endif  /* __i386__ */
 341
 342     return ret;
 343 }
 344
 345
 346 /***********************************************************************
 347  *           wine_pthread_exit_thread
 348  */
 349 void wine_pthread_exit_thread( struct wine_pthread_thread_info *info )
 350 {
 351     wine_switch_to_stack( cleanup_thread, info, get_temp_stack() );
 352 }
 353
 354
 355 /***********************************************************************
 356  *           wine_pthread_abort_thread
 357  */
 358 void wine_pthread_abort_thread( int status )
 359 {
 360 #ifdef HAVE__LWP_CREATE
 361     _lwp_exit();
 362 #endif
 363     _exit( status );
 364 }
 365
 366
 367 /* Currently this probably works only for glibc2,
 368  * which checks for the presence of double-underscore-prepended
 369  * pthread primitives, and use them if available.
 370  * If they are not available, the libc defaults to
 371  * non-threadsafe operation (not good). */
 372
 373 #if defined(__GLIBC__) || defined(__FreeBSD__)
 374
 375 /* adapt as necessary (a construct like this is used in glibc sources) */
 376 #define strong_alias(orig, alias) \
 377  asm(".globl " PSTR(alias) "\n" \
 378      "\t.set " PSTR(alias) "," PSTR(orig))
 379
 380 struct fork_block;
 381
 382 /* pthread functions redirection */
 383
 384 struct pthread_functions
 385 {
 386   pid_t (*ptr_pthread_fork) (struct fork_block *);
 387   int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
 388   int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
 389   int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
 390   int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
 391   int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
 392   int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
 393   int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
 394   int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *, struct sched_param *);
 395   int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *, const struct sched_param *);
 396   int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
 397   int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
 398   int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
 399   int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
 400   int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
 401   int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
 402   int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
 403   int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
 404   int (*ptr___pthread_cond_init) (pthread_cond_t *, const pthread_condattr_t *);
 405   int (*ptr___pthread_cond_signal) (pthread_cond_t *);
 406   int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
 407   int (*ptr_pthread_equal) (pthread_t, pthread_t);
 408   void (*ptr___pthread_exit) (void *);
 409   int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
 410   int (*ptr_pthread_setschedparam) (pthread_t, int, const struct sched_param *);
 411   int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
 412   int (*ptr_pthread_mutex_init) (pthread_mutex_t *, const pthread_mutexattr_t *);
 413   int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
 414   int (*ptr_pthread_mutex_trylock) (pthread_mutex_t *);
 415   int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
 416   pthread_t (*ptr_pthread_self) (void);
 417   int (*ptr_pthread_setcancelstate) (int, int *);
 418   int (*ptr_pthread_setcanceltype) (int, int *);
 419   void (*ptr_pthread_do_exit) (void *retval, char *currentframe);
 420   void (*ptr_pthread_cleanup_upto) (jmp_buf target, char *targetframe);
 421   pthread_descr (*ptr_pthread_thread_self) (void);
 422   int (*ptr_pthread_internal_tsd_set) (int key, const void *pointer);
 423   void * (*ptr_pthread_internal_tsd_get) (int key);
 424   void ** __attribute__ ((__const__)) (*ptr_pthread_internal_tsd_address) (int key);
 425   int (*ptr_pthread_sigaction) (int sig, const struct sigaction * act, struct sigaction *oact);
 426   int (*ptr_pthread_sigwait) (const sigset_t *set, int *sig);
 427   int (*ptr_pthread_raise) (int sig);
 428   int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *, const struct timespec *);
 429   void (*ptr__pthread_cleanup_push) (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg);
 430   void (*ptr__pthread_cleanup_pop) (struct _pthread_cleanup_buffer * buffer, int execute);
 431 };
 432
 433 static pid_t (*libc_fork)(void);
 434 static int (*libc_sigaction)(int signum, const struct sigaction *act, struct sigaction *oldact);
 435 static int *(*libc_pthread_init)( const struct pthread_functions *funcs );
 436
 437 static struct pthread_functions libc_pthread_functions;
 438
 439 strong_alias(__pthread_thread_self, pthread_thread_self);
 440
 441 /* redefine this to prevent libpthread from overriding our function pointers */
 442 int *__libc_pthread_init( const struct pthread_functions *funcs )
 443 {
 444     return libc_multiple_threads;
 445 }
 446
 447 typedef struct _wine_cleanup {
 448   void (*routine)(void *);
 449   void *arg;
 450 } *wine_cleanup;
 451
 452 int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void*
 453         (*start_routine)(void *), void* arg)
 454 {
 455     assert( funcs.ptr_pthread_create );
 456     return funcs.ptr_pthread_create( thread, attr, start_routine, arg );
 457 }
 458
 459 int pthread_cancel(pthread_t thread)
 460 {
 461     assert( funcs.ptr_pthread_cancel );
 462     return funcs.ptr_pthread_cancel( thread );
 463 }
 464
 465 int pthread_join(pthread_t thread, void **value_ptr)
 466 {
 467     assert( funcs.ptr_pthread_join );
 468     return funcs.ptr_pthread_join( thread, value_ptr );
 469 }
 470
 471 int pthread_detach(pthread_t thread)
 472 {
 473     assert( funcs.ptr_pthread_detach );
 474     return funcs.ptr_pthread_detach( thread );
 475 }
 476
 477 /* FIXME: we have no equivalents in win32 for the policys */
 478 /* so just keep this as a stub */
 479 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
 480 {
 481   P_OUTPUT("FIXME:pthread_attr_setschedpolicy\n");
 482   return 0;
 483 }
 484
 485 /* FIXME: no win32 equivalent for scope */
 486 int pthread_attr_setscope(pthread_attr_t *attr, int scope)
 487 {
 488   P_OUTPUT("FIXME:pthread_attr_setscope\n");
 489   return 0; /* return success */
 490 }
 491
 492 /* FIXME: no win32 equivalent for schedule param */
 493 int pthread_attr_setschedparam(pthread_attr_t *attr,
 494     const struct sched_param *param)
 495 {
 496   P_OUTPUT("FIXME:pthread_attr_setschedparam\n");
 497   return 0; /* return success */
 498 }
 499
 500 /* FIXME */
 501 int pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
 502 {
 503   return 0; /* return success */
 504 }
 505
 506 int __pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
 507 {
 508     static pthread_once_t the_once = PTHREAD_ONCE_INIT;
 509     long once_now;
 510
 511     memcpy(&once_now,&the_once,sizeof(once_now));
 512     if (interlocked_cmpxchg((long*)once_control, once_now+1, once_now) == once_now)
 513         (*init_routine)();
 514     return 0;
 515 }
 516 strong_alias(__pthread_once, pthread_once);
 517
 518 void __pthread_kill_other_threads_np(void)
 519 {
 520     /* we don't need to do anything here */
 521 }
 522 strong_alias(__pthread_kill_other_threads_np, pthread_kill_other_threads_np);
 523
 524 /***** atfork *****/
 525
 526 #define MAX_ATFORK 8  /* libc doesn't need that many anyway */
 527
 528 static pthread_mutex_t atfork_mutex = PTHREAD_MUTEX_INITIALIZER;
 529
 530 typedef void (*atfork_handler)();
 531 static atfork_handler atfork_prepare[MAX_ATFORK];
 532 static atfork_handler atfork_parent[MAX_ATFORK];
 533 static atfork_handler atfork_child[MAX_ATFORK];
 534 static int atfork_count;
 535
 536 int __pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
 537 {
 538     pthread_mutex_lock( &atfork_mutex );
 539     assert( atfork_count < MAX_ATFORK );
 540     atfork_prepare[atfork_count] = prepare;
 541     atfork_parent[atfork_count] = parent;
 542     atfork_child[atfork_count] = child;
 543     atfork_count++;
 544     pthread_mutex_unlock( &atfork_mutex );
 545     return 0;
 546 }
 547 strong_alias(__pthread_atfork, pthread_atfork);
 548
 549 pid_t __fork(void)
 550 {
 551     pid_t pid;
 552     int i;
 553
 554     if (!libc_fork)
 555     {
 556         libc_fork = dlsym( RTLD_NEXT, "fork" );
 557         assert( libc_fork );
 558     }
 559     pthread_mutex_lock( &atfork_mutex );
 560     /* prepare handlers are called in reverse insertion order */
 561     for (i = atfork_count - 1; i >= 0; i--) if (atfork_prepare[i]) atfork_prepare[i]();
 562     if (!(pid = libc_fork()))
 563     {
 564         pthread_mutex_init( &atfork_mutex, NULL );
 565         for (i = 0; i < atfork_count; i++) if (atfork_child[i]) atfork_child[i]();
 566     }
 567     else
 568     {
 569         for (i = 0; i < atfork_count; i++) if (atfork_parent[i]) atfork_parent[i]();
 570         pthread_mutex_unlock( &atfork_mutex );
 571     }
 572     return pid;
 573 }
 574 strong_alias(__fork, fork);
 575
 576 /***** MUTEXES *****/
 577
 578 int __pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr)
 579 {
 580     if (!funcs.ptr_pthread_mutex_init) return 0;
 581     return funcs.ptr_pthread_mutex_init( mutex, mutexattr );
 582 }
 583 strong_alias(__pthread_mutex_init, pthread_mutex_init);
 584
 585 int __pthread_mutex_lock(pthread_mutex_t *mutex)
 586 {
 587     if (!funcs.ptr_pthread_mutex_lock) return 0;
 588     return funcs.ptr_pthread_mutex_lock( mutex );
 589 }
 590 strong_alias(__pthread_mutex_lock, pthread_mutex_lock);
 591
 592 int __pthread_mutex_trylock(pthread_mutex_t *mutex)
 593 {
 594     if (!funcs.ptr_pthread_mutex_trylock) return 0;
 595     return funcs.ptr_pthread_mutex_trylock( mutex );
 596 }
 597 strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock);
 598
 599 int __pthread_mutex_unlock(pthread_mutex_t *mutex)
 600 {
 601     if (!funcs.ptr_pthread_mutex_unlock) return 0;
 602     return funcs.ptr_pthread_mutex_unlock( mutex );
 603 }
 604 strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
 605
 606 int __pthread_mutex_destroy(pthread_mutex_t *mutex)
 607 {
 608     if (!funcs.ptr_pthread_mutex_destroy) return 0;
 609     return funcs.ptr_pthread_mutex_destroy( mutex );
 610 }
 611 strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy);
 612
 613
 614 /***** MUTEX ATTRIBUTES *****/
 615 /* just dummies, since critical sections are always recursive */
 616
 617 int __pthread_mutexattr_init(pthread_mutexattr_t *attr)
 618 {
 619   return 0;
 620 }
 621 strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init);
 622
 623 int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
 624 {
 625   return 0;
 626 }
 627 strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy);
 628
 629 int __pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
 630 {
 631   return 0;
 632 }
 633 strong_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
 634
 635 int __pthread_mutexattr_getkind_np(pthread_mutexattr_t *attr, int *kind)
 636 {
 637   *kind = PTHREAD_MUTEX_RECURSIVE;
 638   return 0;
 639 }
 640 strong_alias(__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
 641
 642 int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind)
 643 {
 644   return 0;
 645 }
 646 strong_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype);
 647
 648 int __pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *kind)
 649 {
 650   *kind = PTHREAD_MUTEX_RECURSIVE;
 651   return 0;
 652 }
 653 strong_alias(__pthread_mutexattr_gettype, pthread_mutexattr_gettype);
 654
 655
 656 /***** THREAD-SPECIFIC VARIABLES (KEYS) *****/
 657
 658 int __pthread_key_create(pthread_key_t *key, void (*destr_function)(void *))
 659 {
 660     static long keycnt = FIRST_KEY;
 661     *key = interlocked_xchg_add(&keycnt, 1);
 662     return 0;
 663 }
 664 strong_alias(__pthread_key_create, pthread_key_create);
 665
 666 int __pthread_key_delete(pthread_key_t key)
 667 {
 668   return 0;
 669 }
 670 strong_alias(__pthread_key_delete, pthread_key_delete);
 671
 672 int __pthread_setspecific(pthread_key_t key, const void *pointer)
 673 {
 674     pthread_descr descr = __pthread_thread_self();
 675     descr->key_data[key] = pointer;
 676     return 0;
 677 }
 678 strong_alias(__pthread_setspecific, pthread_setspecific);
 679
 680 void *__pthread_getspecific(pthread_key_t key)
 681 {
 682     pthread_descr descr = __pthread_thread_self();
 683     return (void *)descr->key_data[key];
 684 }
 685 strong_alias(__pthread_getspecific, pthread_getspecific);
 686
 687 static int pthread_internal_tsd_set( int key, const void *pointer )
 688 {
 689     pthread_descr descr = __pthread_thread_self();
 690     descr->tsd_data[key] = pointer;
 691     return 0;
 692 }
 693 int (*__libc_internal_tsd_set)(int, const void *) = pthread_internal_tsd_set;
 694
 695 static void *pthread_internal_tsd_get( int key )
 696 {
 697     pthread_descr descr = __pthread_thread_self();
 698     return (void *)descr->tsd_data[key];
 699 }
 700 void* (*__libc_internal_tsd_get)(int) = pthread_internal_tsd_get;
 701
 702 static void ** __attribute__((const)) pthread_internal_tsd_address( int key )
 703 {
 704     pthread_descr descr = __pthread_thread_self();
 705     return (void **)&descr->tsd_data[key];
 706 }
 707 void** (*__libc_internal_tsd_address)(int) = pthread_internal_tsd_address;
 708
 709 /***** "EXCEPTION" FRAMES *****/
 710 /* not implemented right now */
 711
 712 void _pthread_cleanup_push(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 713 {
 714   ((wine_cleanup)buffer)->routine = routine;
 715   ((wine_cleanup)buffer)->arg = arg;
 716 }
 717
 718 void _pthread_cleanup_pop(struct _pthread_cleanup_buffer *buffer, int execute)
 719 {
 720   if (execute) (*(((wine_cleanup)buffer)->routine))(((wine_cleanup)buffer)->arg);
 721 }
 722
 723 void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 724 {
 725   _pthread_cleanup_push(buffer, routine, arg);
 726 }
 727
 728 void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer *buffer, int execute)
 729 {
 730   _pthread_cleanup_pop(buffer, execute);
 731 }
 732
 733 void __pthread_cleanup_upto(jmp_buf target, char *frame)
 734 {
 735     /* FIXME */
 736 }
 737
 738 /***** CONDITIONS *****/
 739
 740 int __pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
 741 {
 742     if (!funcs.ptr_pthread_cond_init) return 0;
 743     return funcs.ptr_pthread_cond_init(cond, cond_attr);
 744 }
 745 strong_alias(__pthread_cond_init, pthread_cond_init);
 746
 747 int __pthread_cond_destroy(pthread_cond_t *cond)
 748 {
 749     if (!funcs.ptr_pthread_cond_destroy) return 0;
 750     return funcs.ptr_pthread_cond_destroy(cond);
 751 }
 752 strong_alias(__pthread_cond_destroy, pthread_cond_destroy);
 753
 754 int __pthread_cond_signal(pthread_cond_t *cond)
 755 {
 756     if (!funcs.ptr_pthread_cond_signal) return 0;
 757     return funcs.ptr_pthread_cond_signal(cond);
 758 }
 759 strong_alias(__pthread_cond_signal, pthread_cond_signal);
 760
 761 int __pthread_cond_broadcast(pthread_cond_t *cond)
 762 {
 763     if (!funcs.ptr_pthread_cond_broadcast) return 0;
 764     return funcs.ptr_pthread_cond_broadcast(cond);
 765 }
 766 strong_alias(__pthread_cond_broadcast, pthread_cond_broadcast);
 767
 768 int __pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
 769 {
 770     if (!funcs.ptr_pthread_cond_wait) return 0;
 771     return funcs.ptr_pthread_cond_wait(cond, mutex);
 772 }
 773 strong_alias(__pthread_cond_wait, pthread_cond_wait);
 774
 775 int __pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
 776 {
 777     if (!funcs.ptr_pthread_cond_timedwait) return 0;
 778     return funcs.ptr_pthread_cond_timedwait(cond, mutex, abstime);
 779 }
 780 strong_alias(__pthread_cond_timedwait, pthread_cond_timedwait);
 781
 782 /**** CONDITION ATTRIBUTES *****/
 783 /* not implemented right now */
 784
 785 int pthread_condattr_init(pthread_condattr_t *attr)
 786 {
 787   return 0;
 788 }
 789
 790 int pthread_condattr_destroy(pthread_condattr_t *attr)
 791 {
 792   return 0;
 793 }
 794
 795 /***** READ-WRITE LOCKS *****/
 796
 797 int __pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *rwlock_attr)
 798 {
 799     assert( funcs.ptr_pthread_rwlock_init );
 800     return funcs.ptr_pthread_rwlock_init( rwlock, rwlock_attr );
 801 }
 802 strong_alias(__pthread_rwlock_init, pthread_rwlock_init);
 803
 804 int __pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
 805 {
 806     assert( funcs.ptr_pthread_rwlock_destroy );
 807     return funcs.ptr_pthread_rwlock_destroy( rwlock );
 808 }
 809 strong_alias(__pthread_rwlock_destroy, pthread_rwlock_destroy);
 810
 811 int __pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 812 {
 813     if (!funcs.ptr_pthread_rwlock_rdlock) return 0;
 814     return funcs.ptr_pthread_rwlock_rdlock( rwlock );
 815 }
 816 strong_alias(__pthread_rwlock_rdlock, pthread_rwlock_rdlock);
 817
 818 int __pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 819 {
 820     assert( funcs.ptr_pthread_rwlock_tryrdlock );
 821     return funcs.ptr_pthread_rwlock_tryrdlock( rwlock );
 822 }
 823 strong_alias(__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock);
 824
 825 int __pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 826 {
 827     assert( funcs.ptr_pthread_rwlock_wrlock );
 828     return funcs.ptr_pthread_rwlock_wrlock( rwlock );
 829 }
 830 strong_alias(__pthread_rwlock_wrlock, pthread_rwlock_wrlock);
 831
 832 int __pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 833 {
 834     assert( funcs.ptr_pthread_rwlock_trywrlock );
 835     return funcs.ptr_pthread_rwlock_trywrlock( rwlock );
 836 }
 837 strong_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock);
 838
 839 int __pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
 840 {
 841     if (!funcs.ptr_pthread_rwlock_unlock) return 0;
 842     return funcs.ptr_pthread_rwlock_unlock( rwlock );
 843 }
 844 strong_alias(__pthread_rwlock_unlock, pthread_rwlock_unlock);
 845
 846 /**** READ-WRITE LOCK ATTRIBUTES *****/
 847 /* not implemented right now */
 848
 849 int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
 850 {
 851   return 0;
 852 }
 853
 854 int __pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
 855 {
 856   return 0;
 857 }
 858 strong_alias(__pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
 859
 860 int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t *attr, int *pref)
 861 {
 862   *pref = 0;
 863   return 0;
 864 }
 865
 866 int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t *attr, int pref)
 867 {
 868   return 0;
 869 }
 870
 871 /***** MISC *****/
 872
 873 pthread_t pthread_self(void)
 874 {
 875     assert( funcs.ptr_pthread_self );
 876     return funcs.ptr_pthread_self();
 877 }
 878
 879 int pthread_equal(pthread_t thread1, pthread_t thread2)
 880 {
 881     assert( funcs.ptr_pthread_equal );
 882     return funcs.ptr_pthread_equal( thread1, thread2 );
 883 }
 884
 885 void __pthread_do_exit(void *retval, char *currentframe)
 886 {
 887     assert( funcs.ptr_pthread_exit );
 888     return funcs.ptr_pthread_exit( retval, currentframe );
 889 }
 890
 891 void __pthread_exit(void *retval)
 892 {
 893     __pthread_do_exit( retval, NULL );
 894 }
 895 strong_alias(__pthread_exit, pthread_exit);
 896
 897 int pthread_setcancelstate(int state, int *oldstate)
 898 {
 899     pthread_descr descr = __pthread_thread_self();
 900     if (oldstate) *oldstate = descr->cancel_state;
 901     descr->cancel_state = state;
 902     return 0;
 903 }
 904
 905 int pthread_setcanceltype(int type, int *oldtype)
 906 {
 907     pthread_descr descr = __pthread_thread_self();
 908     if (oldtype) *oldtype = descr->cancel_type;
 909     descr->cancel_type = type;
 910     return 0;
 911 }
 912
 913 /***** ANTI-OVERRIDES *****/
 914 /* pthreads tries to override these, point them back to libc */
 915
 916 int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 917 {
 918     if (!libc_sigaction)
 919     {
 920         libc_sigaction = dlsym( RTLD_NEXT, "sigaction" );
 921         assert( libc_sigaction );
 922     }
 923     return libc_sigaction(signum, act, oldact);
 924 }
 925
 926 void __pthread_initialize(void)
 927 {
 928     static int done;
 929
 930     if (!done)
 931     {
 932         done = 1;
 933         libc_fork = dlsym( RTLD_NEXT, "fork" );
 934         libc_sigaction = dlsym( RTLD_NEXT, "sigaction" );
 935         libc_uselocale = dlsym( RTLD_NEXT, "uselocale" );
 936         libc_pthread_init = dlsym( RTLD_NEXT, "__libc_pthread_init" );
 937         if (libc_pthread_init) libc_multiple_threads = libc_pthread_init( &libc_pthread_functions );
 938     }
 939 }
 940 DECL_GLOBAL_CONSTRUCTOR(init) { __pthread_initialize(); }
 941
 942 static struct pthread_functions libc_pthread_functions =
 943 {
 944     NULL,                          /* ptr_pthread_fork */
 945     NULL, /* FIXME */              /* ptr_pthread_attr_destroy */
 946     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_0 */
 947     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_1 */
 948     NULL, /* FIXME */              /* ptr_pthread_attr_getdetachstate */
 949     NULL, /* FIXME */              /* ptr_pthread_attr_setdetachstate */
 950     NULL, /* FIXME */              /* ptr_pthread_attr_getinheritsched */
 951     NULL, /* FIXME */              /* ptr_pthread_attr_setinheritsched */
 952     NULL, /* FIXME */              /* ptr_pthread_attr_getschedparam */
 953     pthread_attr_setschedparam,    /* ptr_pthread_attr_setschedparam */
 954     NULL, /* FIXME */              /* ptr_pthread_attr_getschedpolicy */
 955     NULL, /* FIXME */              /* ptr_pthread_attr_setschedpolicy */
 956     NULL, /* FIXME */              /* ptr_pthread_attr_getscope */
 957     NULL, /* FIXME */              /* ptr_pthread_attr_setscope */
 958     pthread_condattr_destroy,      /* ptr_pthread_condattr_destroy */
 959     pthread_condattr_init,         /* ptr_pthread_condattr_init */
 960     __pthread_cond_broadcast,      /* ptr___pthread_cond_broadcast */
 961     __pthread_cond_destroy,        /* ptr___pthread_cond_destroy */
 962     __pthread_cond_init,           /* ptr___pthread_cond_init */
 963     __pthread_cond_signal,         /* ptr___pthread_cond_signal */
 964     __pthread_cond_wait,           /* ptr___pthread_cond_wait */
 965     pthread_equal,                 /* ptr_pthread_equal */
 966     __pthread_exit,                /* ptr___pthread_exit */
 967     NULL, /* FIXME */              /* ptr_pthread_getschedparam */
 968     NULL, /* FIXME */              /* ptr_pthread_setschedparam */
 969     __pthread_mutex_destroy,       /* ptr_pthread_mutex_destroy */
 970     __pthread_mutex_init,          /* ptr_pthread_mutex_init */
 971     __pthread_mutex_lock,          /* ptr_pthread_mutex_lock */
 972     __pthread_mutex_trylock,       /* ptr_pthread_mutex_trylock */
 973     __pthread_mutex_unlock,        /* ptr_pthread_mutex_unlock */
 974     pthread_self,                  /* ptr_pthread_self */
 975     pthread_setcancelstate,        /* ptr_pthread_setcancelstate */
 976     pthread_setcanceltype,         /* ptr_pthread_setcanceltype */
 977     __pthread_do_exit,             /* ptr_pthread_do_exit */
 978     __pthread_cleanup_upto,        /* ptr_pthread_cleanup_upto */
 979     __pthread_thread_self,         /* ptr_pthread_thread_self */
 980     pthread_internal_tsd_set,      /* ptr_pthread_internal_tsd_set */
 981     pthread_internal_tsd_get,      /* ptr_pthread_internal_tsd_get */
 982     pthread_internal_tsd_address,  /* ptr_pthread_internal_tsd_address */
 983     NULL,                          /* ptr_pthread_sigaction */
 984     NULL,                          /* ptr_pthread_sigwait */
 985     NULL,                          /* ptr_pthread_raise */
 986     __pthread_cond_timedwait,      /* ptr___pthread_cond_timedwait */
 987     _pthread_cleanup_push,         /* ptr__pthread_cleanup_push */
 988     _pthread_cleanup_pop           /* ptr__pthread_cleanup_pop */
 989 };
 990
 991 #endif /* __GLIBC__ || __FREEBSD__ */