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     if (funcs.ptr_set_thread_data)
 224     {
 225         descr = calloc( 1, sizeof(*descr) );
 226         funcs.ptr_set_thread_data( descr );
 227         if (libc_multiple_threads) *libc_multiple_threads = 1;
 228     }
 229     else  /* first thread */
 230     {
 231         descr = &initial_descr;
 232         writejump( "__errno_location", __errno_location );
 233         writejump( "__h_errno_location", __h_errno_location );
 234         writejump( "__res_state", __res_state );
 235     }
 236     descr->cancel_state = PTHREAD_CANCEL_ENABLE;
 237     descr->cancel_type  = PTHREAD_CANCEL_ASYNCHRONOUS;
 238     if (libc_uselocale) libc_uselocale( -1 /*LC_GLOBAL_LOCALE*/ );
 239 }
 240
 241
 242 /***********************************************************************
 243  *           wine_pthread_create_thread
 244  */
 245 int wine_pthread_create_thread( struct wine_pthread_thread_info *info )
 246 {
 247     if (!info->stack_base)
 248     {
 249         info->stack_base = wine_anon_mmap( NULL, info->stack_size,
 250                                            PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 251         if (info->stack_base == (void *)-1) return -1;
 252     }
 253 #ifdef HAVE_CLONE
 254     if (clone( (int (*)(void *))info->entry, (char *)info->stack_base + info->stack_size,
 255                CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD, info ) < 0)
 256         return -1;
 257     return 0;
 258 #elif defined(HAVE_RFORK)
 259     {
 260         void **sp = (void **)((char *)info->stack_base + info->stack_size);
 261         *--sp = info;
 262         *--sp = 0;
 263         *--sp = info->entry;
 264         __asm__ __volatile__(
 265             "pushl %2;\n\t"             /* flags */
 266             "pushl $0;\n\t"             /* 0 ? */
 267             "movl %1,%%eax;\n\t"        /* SYS_rfork */
 268             ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
 269             "cmpl $0, %%edx;\n\t"
 270             "je 1f;\n\t"
 271             "movl %0,%%esp;\n\t"        /* child -> new thread */
 272             "ret;\n"
 273             "1:\n\t"                    /* parent -> caller thread */
 274             "addl $8,%%esp" :
 275             : "r" (sp), "g" (SYS_rfork), "g" (RFPROC | RFMEM | RFTHREAD)
 276             : "eax", "edx");
 277         return 0;
 278     }
 279 #elif defined(HAVE__LWP_CREATE)
 280     {
 281         ucontext_t context;
 282         _lwp_makecontext( &context, (void(*)(void *))info->entry, info,
 283                           NULL, info->stack_base, info->stack_size );
 284         if ( _lwp_create( &context, 0, NULL ) )
 285             return -1;
 286         return 0;
 287     }
 288 #endif
 289     return -1;
 290 }
 291
 292
 293 /***********************************************************************
 294  *           wine_pthread_init_current_teb
 295  *
 296  * Set the current TEB for a new thread.
 297  */
 298 void wine_pthread_init_current_teb( struct wine_pthread_thread_info *info )
 299 {
 300 #ifdef __i386__
 301     /* On the i386, the current thread is in the %fs register */
 302     LDT_ENTRY fs_entry;
 303
 304     wine_ldt_set_base( &fs_entry, info->teb_base );
 305     wine_ldt_set_limit( &fs_entry, info->teb_size - 1 );
 306     wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 307     wine_ldt_init_fs( info->teb_sel, &fs_entry );
 308 #elif defined(__powerpc__)
 309     /* On PowerPC, the current TEB is in the gpr13 register */
 310 # ifdef __APPLE__
 311     __asm__ __volatile__("mr r13, %0" : : "r" (info->teb_base));
 312 # else
 313     __asm__ __volatile__("mr 2, %0" : : "r" (info->teb_base));
 314 # endif
 315 #elif defined(HAVE__LWP_CREATE)
 316     /* On non-i386 Solaris, we use the LWP private pointer */
 317     _lwp_setprivate( info->teb_base );
 318 #endif
 319
 320     /* set pid and tid */
 321     info->pid = getpid();
 322 #ifdef HAVE__LWP_SELF
 323     info->tid = _lwp_self();
 324 #else
 325     info->tid = -1;
 326 #endif
 327 }
 328
 329
 330 /***********************************************************************
 331  *           wine_pthread_get_current_teb
 332  */
 333 void *wine_pthread_get_current_teb(void)
 334 {
 335     void *ret;
 336
 337 #ifdef __i386__
 338     __asm__( ".byte 0x64\n\tmovl 0x18,%0" : "=r" (ret) );
 339 #elif defined(HAVE__LWP_CREATE)
 340     ret = _lwp_getprivate();
 341 #elif defined(__powerpc__)
 342 # ifdef __APPLE__
 343     __asm__( "mr %0,r13" : "=r" (ret) );
 344 # else
 345     __asm__( "mr %0,2" : "=r" (ret) );
 346 # endif
 347 #else
 348 # error wine_pthread_get_current_teb not defined for this architecture
 349 #endif  /* __i386__ */
 350
 351     return ret;
 352 }
 353
 354
 355 /***********************************************************************
 356  *           wine_pthread_exit_thread
 357  */
 358 void wine_pthread_exit_thread( struct wine_pthread_thread_info *info )
 359 {
 360     wine_switch_to_stack( cleanup_thread, info, get_temp_stack() );
 361 }
 362
 363
 364 /***********************************************************************
 365  *           wine_pthread_abort_thread
 366  */
 367 void wine_pthread_abort_thread( int status )
 368 {
 369 #ifdef HAVE__LWP_CREATE
 370     _lwp_exit();
 371 #endif
 372     _exit( status );
 373 }
 374
 375
 376 /* Currently this probably works only for glibc2,
 377  * which checks for the presence of double-underscore-prepended
 378  * pthread primitives, and use them if available.
 379  * If they are not available, the libc defaults to
 380  * non-threadsafe operation (not good). */
 381
 382 #if defined(__GLIBC__) || defined(__FreeBSD__)
 383
 384 /* adapt as necessary (a construct like this is used in glibc sources) */
 385 #define strong_alias(orig, alias) \
 386  asm(".globl " PSTR(alias) "\n" \
 387      "\t.set " PSTR(alias) "," PSTR(orig))
 388
 389 struct fork_block;
 390
 391 /* pthread functions redirection */
 392
 393 struct pthread_functions
 394 {
 395   pid_t (*ptr_pthread_fork) (struct fork_block *);
 396   int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
 397   int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
 398   int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
 399   int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
 400   int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
 401   int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
 402   int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
 403   int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *, struct sched_param *);
 404   int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *, const struct sched_param *);
 405   int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
 406   int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
 407   int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
 408   int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
 409   int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
 410   int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
 411   int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
 412   int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
 413   int (*ptr___pthread_cond_init) (pthread_cond_t *, const pthread_condattr_t *);
 414   int (*ptr___pthread_cond_signal) (pthread_cond_t *);
 415   int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
 416   int (*ptr_pthread_equal) (pthread_t, pthread_t);
 417   void (*ptr___pthread_exit) (void *);
 418   int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
 419   int (*ptr_pthread_setschedparam) (pthread_t, int, const struct sched_param *);
 420   int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
 421   int (*ptr_pthread_mutex_init) (pthread_mutex_t *, const pthread_mutexattr_t *);
 422   int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
 423   int (*ptr_pthread_mutex_trylock) (pthread_mutex_t *);
 424   int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
 425   pthread_t (*ptr_pthread_self) (void);
 426   int (*ptr_pthread_setcancelstate) (int, int *);
 427   int (*ptr_pthread_setcanceltype) (int, int *);
 428   void (*ptr_pthread_do_exit) (void *retval, char *currentframe);
 429   void (*ptr_pthread_cleanup_upto) (jmp_buf target, char *targetframe);
 430   pthread_descr (*ptr_pthread_thread_self) (void);
 431   int (*ptr_pthread_internal_tsd_set) (int key, const void *pointer);
 432   void * (*ptr_pthread_internal_tsd_get) (int key);
 433   void ** __attribute__ ((__const__)) (*ptr_pthread_internal_tsd_address) (int key);
 434   int (*ptr_pthread_sigaction) (int sig, const struct sigaction * act, struct sigaction *oact);
 435   int (*ptr_pthread_sigwait) (const sigset_t *set, int *sig);
 436   int (*ptr_pthread_raise) (int sig);
 437   int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *, const struct timespec *);
 438   void (*ptr__pthread_cleanup_push) (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg);
 439   void (*ptr__pthread_cleanup_pop) (struct _pthread_cleanup_buffer * buffer, int execute);
 440 };
 441
 442 static pid_t (*libc_fork)(void);
 443 static int (*libc_sigaction)(int signum, const struct sigaction *act, struct sigaction *oldact);
 444 static int *(*libc_pthread_init)( const struct pthread_functions *funcs );
 445
 446 static struct pthread_functions libc_pthread_functions;
 447
 448 strong_alias(__pthread_thread_self, pthread_thread_self);
 449
 450 /* redefine this to prevent libpthread from overriding our function pointers */
 451 int *__libc_pthread_init( const struct pthread_functions *funcs )
 452 {
 453     return libc_multiple_threads;
 454 }
 455
 456 typedef struct _wine_cleanup {
 457   void (*routine)(void *);
 458   void *arg;
 459 } *wine_cleanup;
 460
 461 int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void*
 462         (*start_routine)(void *), void* arg)
 463 {
 464     assert( funcs.ptr_pthread_create );
 465     return funcs.ptr_pthread_create( thread, attr, start_routine, arg );
 466 }
 467
 468 int pthread_cancel(pthread_t thread)
 469 {
 470     assert( funcs.ptr_pthread_cancel );
 471     return funcs.ptr_pthread_cancel( thread );
 472 }
 473
 474 int pthread_join(pthread_t thread, void **value_ptr)
 475 {
 476     assert( funcs.ptr_pthread_join );
 477     return funcs.ptr_pthread_join( thread, value_ptr );
 478 }
 479
 480 int pthread_detach(pthread_t thread)
 481 {
 482     assert( funcs.ptr_pthread_detach );
 483     return funcs.ptr_pthread_detach( thread );
 484 }
 485
 486 /* FIXME: we have no equivalents in win32 for the policys */
 487 /* so just keep this as a stub */
 488 int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
 489 {
 490   P_OUTPUT("FIXME:pthread_attr_setschedpolicy\n");
 491   return 0;
 492 }
 493
 494 /* FIXME: no win32 equivalent for scope */
 495 int pthread_attr_setscope(pthread_attr_t *attr, int scope)
 496 {
 497   P_OUTPUT("FIXME:pthread_attr_setscope\n");
 498   return 0; /* return success */
 499 }
 500
 501 /* FIXME: no win32 equivalent for schedule param */
 502 int pthread_attr_setschedparam(pthread_attr_t *attr,
 503     const struct sched_param *param)
 504 {
 505   P_OUTPUT("FIXME:pthread_attr_setschedparam\n");
 506   return 0; /* return success */
 507 }
 508
 509 /* FIXME */
 510 int pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
 511 {
 512   return 0; /* return success */
 513 }
 514
 515 int __pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
 516 {
 517     static pthread_once_t the_once = PTHREAD_ONCE_INIT;
 518     long once_now;
 519
 520     memcpy(&once_now,&the_once,sizeof(once_now));
 521     if (interlocked_cmpxchg((long*)once_control, once_now+1, once_now) == once_now)
 522         (*init_routine)();
 523     return 0;
 524 }
 525 strong_alias(__pthread_once, pthread_once);
 526
 527 void __pthread_kill_other_threads_np(void)
 528 {
 529     /* we don't need to do anything here */
 530 }
 531 strong_alias(__pthread_kill_other_threads_np, pthread_kill_other_threads_np);
 532
 533 /***** atfork *****/
 534
 535 #define MAX_ATFORK 8  /* libc doesn't need that many anyway */
 536
 537 static pthread_mutex_t atfork_mutex = PTHREAD_MUTEX_INITIALIZER;
 538
 539 typedef void (*atfork_handler)();
 540 static atfork_handler atfork_prepare[MAX_ATFORK];
 541 static atfork_handler atfork_parent[MAX_ATFORK];
 542 static atfork_handler atfork_child[MAX_ATFORK];
 543 static int atfork_count;
 544
 545 int __pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
 546 {
 547     pthread_mutex_lock( &atfork_mutex );
 548     assert( atfork_count < MAX_ATFORK );
 549     atfork_prepare[atfork_count] = prepare;
 550     atfork_parent[atfork_count] = parent;
 551     atfork_child[atfork_count] = child;
 552     atfork_count++;
 553     pthread_mutex_unlock( &atfork_mutex );
 554     return 0;
 555 }
 556 strong_alias(__pthread_atfork, pthread_atfork);
 557
 558 pid_t __fork(void)
 559 {
 560     pid_t pid;
 561     int i;
 562
 563     if (!libc_fork)
 564     {
 565         libc_fork = dlsym( RTLD_NEXT, "fork" );
 566         assert( libc_fork );
 567     }
 568     pthread_mutex_lock( &atfork_mutex );
 569     /* prepare handlers are called in reverse insertion order */
 570     for (i = atfork_count - 1; i >= 0; i--) if (atfork_prepare[i]) atfork_prepare[i]();
 571     if (!(pid = libc_fork()))
 572     {
 573         pthread_mutex_init( &atfork_mutex, NULL );
 574         for (i = 0; i < atfork_count; i++) if (atfork_child[i]) atfork_child[i]();
 575     }
 576     else
 577     {
 578         for (i = 0; i < atfork_count; i++) if (atfork_parent[i]) atfork_parent[i]();
 579         pthread_mutex_unlock( &atfork_mutex );
 580     }
 581     return pid;
 582 }
 583 strong_alias(__fork, fork);
 584
 585 /***** MUTEXES *****/
 586
 587 int __pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr)
 588 {
 589     if (!funcs.ptr_pthread_mutex_init) return 0;
 590     return funcs.ptr_pthread_mutex_init( mutex, mutexattr );
 591 }
 592 strong_alias(__pthread_mutex_init, pthread_mutex_init);
 593
 594 int __pthread_mutex_lock(pthread_mutex_t *mutex)
 595 {
 596     if (!funcs.ptr_pthread_mutex_lock) return 0;
 597     return funcs.ptr_pthread_mutex_lock( mutex );
 598 }
 599 strong_alias(__pthread_mutex_lock, pthread_mutex_lock);
 600
 601 int __pthread_mutex_trylock(pthread_mutex_t *mutex)
 602 {
 603     if (!funcs.ptr_pthread_mutex_trylock) return 0;
 604     return funcs.ptr_pthread_mutex_trylock( mutex );
 605 }
 606 strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock);
 607
 608 int __pthread_mutex_unlock(pthread_mutex_t *mutex)
 609 {
 610     if (!funcs.ptr_pthread_mutex_unlock) return 0;
 611     return funcs.ptr_pthread_mutex_unlock( mutex );
 612 }
 613 strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
 614
 615 int __pthread_mutex_destroy(pthread_mutex_t *mutex)
 616 {
 617     if (!funcs.ptr_pthread_mutex_destroy) return 0;
 618     return funcs.ptr_pthread_mutex_destroy( mutex );
 619 }
 620 strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy);
 621
 622
 623 /***** MUTEX ATTRIBUTES *****/
 624 /* just dummies, since critical sections are always recursive */
 625
 626 int __pthread_mutexattr_init(pthread_mutexattr_t *attr)
 627 {
 628   return 0;
 629 }
 630 strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init);
 631
 632 int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
 633 {
 634   return 0;
 635 }
 636 strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy);
 637
 638 int __pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
 639 {
 640   return 0;
 641 }
 642 strong_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
 643
 644 int __pthread_mutexattr_getkind_np(pthread_mutexattr_t *attr, int *kind)
 645 {
 646   *kind = PTHREAD_MUTEX_RECURSIVE;
 647   return 0;
 648 }
 649 strong_alias(__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
 650
 651 int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind)
 652 {
 653   return 0;
 654 }
 655 strong_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype);
 656
 657 int __pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *kind)
 658 {
 659   *kind = PTHREAD_MUTEX_RECURSIVE;
 660   return 0;
 661 }
 662 strong_alias(__pthread_mutexattr_gettype, pthread_mutexattr_gettype);
 663
 664
 665 /***** THREAD-SPECIFIC VARIABLES (KEYS) *****/
 666
 667 int __pthread_key_create(pthread_key_t *key, void (*destr_function)(void *))
 668 {
 669     static long keycnt = FIRST_KEY;
 670     *key = interlocked_xchg_add(&keycnt, 1);
 671     return 0;
 672 }
 673 strong_alias(__pthread_key_create, pthread_key_create);
 674
 675 int __pthread_key_delete(pthread_key_t key)
 676 {
 677   return 0;
 678 }
 679 strong_alias(__pthread_key_delete, pthread_key_delete);
 680
 681 int __pthread_setspecific(pthread_key_t key, const void *pointer)
 682 {
 683     pthread_descr descr = __pthread_thread_self();
 684     descr->key_data[key] = pointer;
 685     return 0;
 686 }
 687 strong_alias(__pthread_setspecific, pthread_setspecific);
 688
 689 void *__pthread_getspecific(pthread_key_t key)
 690 {
 691     pthread_descr descr = __pthread_thread_self();
 692     return (void *)descr->key_data[key];
 693 }
 694 strong_alias(__pthread_getspecific, pthread_getspecific);
 695
 696 static int pthread_internal_tsd_set( int key, const void *pointer )
 697 {
 698     pthread_descr descr = __pthread_thread_self();
 699     descr->tsd_data[key] = pointer;
 700     return 0;
 701 }
 702 int (*__libc_internal_tsd_set)(int, const void *) = pthread_internal_tsd_set;
 703
 704 static void *pthread_internal_tsd_get( int key )
 705 {
 706     pthread_descr descr = __pthread_thread_self();
 707     return (void *)descr->tsd_data[key];
 708 }
 709 void* (*__libc_internal_tsd_get)(int) = pthread_internal_tsd_get;
 710
 711 static void ** __attribute__((const)) pthread_internal_tsd_address( int key )
 712 {
 713     pthread_descr descr = __pthread_thread_self();
 714     return (void **)&descr->tsd_data[key];
 715 }
 716 void** (*__libc_internal_tsd_address)(int) = pthread_internal_tsd_address;
 717
 718 /***** "EXCEPTION" FRAMES *****/
 719 /* not implemented right now */
 720
 721 void _pthread_cleanup_push(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 722 {
 723   ((wine_cleanup)buffer)->routine = routine;
 724   ((wine_cleanup)buffer)->arg = arg;
 725 }
 726
 727 void _pthread_cleanup_pop(struct _pthread_cleanup_buffer *buffer, int execute)
 728 {
 729   if (execute) (*(((wine_cleanup)buffer)->routine))(((wine_cleanup)buffer)->arg);
 730 }
 731
 732 void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg)
 733 {
 734   _pthread_cleanup_push(buffer, routine, arg);
 735 }
 736
 737 void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer *buffer, int execute)
 738 {
 739   _pthread_cleanup_pop(buffer, execute);
 740 }
 741
 742 void __pthread_cleanup_upto(jmp_buf target, char *frame)
 743 {
 744     /* FIXME */
 745 }
 746
 747 /***** CONDITIONS *****/
 748
 749 int __pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
 750 {
 751     if (!funcs.ptr_pthread_cond_init) return 0;
 752     return funcs.ptr_pthread_cond_init(cond, cond_attr);
 753 }
 754 strong_alias(__pthread_cond_init, pthread_cond_init);
 755
 756 int __pthread_cond_destroy(pthread_cond_t *cond)
 757 {
 758     if (!funcs.ptr_pthread_cond_destroy) return 0;
 759     return funcs.ptr_pthread_cond_destroy(cond);
 760 }
 761 strong_alias(__pthread_cond_destroy, pthread_cond_destroy);
 762
 763 int __pthread_cond_signal(pthread_cond_t *cond)
 764 {
 765     if (!funcs.ptr_pthread_cond_signal) return 0;
 766     return funcs.ptr_pthread_cond_signal(cond);
 767 }
 768 strong_alias(__pthread_cond_signal, pthread_cond_signal);
 769
 770 int __pthread_cond_broadcast(pthread_cond_t *cond)
 771 {
 772     if (!funcs.ptr_pthread_cond_broadcast) return 0;
 773     return funcs.ptr_pthread_cond_broadcast(cond);
 774 }
 775 strong_alias(__pthread_cond_broadcast, pthread_cond_broadcast);
 776
 777 int __pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
 778 {
 779     if (!funcs.ptr_pthread_cond_wait) return 0;
 780     return funcs.ptr_pthread_cond_wait(cond, mutex);
 781 }
 782 strong_alias(__pthread_cond_wait, pthread_cond_wait);
 783
 784 int __pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
 785 {
 786     if (!funcs.ptr_pthread_cond_timedwait) return 0;
 787     return funcs.ptr_pthread_cond_timedwait(cond, mutex, abstime);
 788 }
 789 strong_alias(__pthread_cond_timedwait, pthread_cond_timedwait);
 790
 791 /**** CONDITION ATTRIBUTES *****/
 792 /* not implemented right now */
 793
 794 int pthread_condattr_init(pthread_condattr_t *attr)
 795 {
 796   return 0;
 797 }
 798
 799 int pthread_condattr_destroy(pthread_condattr_t *attr)
 800 {
 801   return 0;
 802 }
 803
 804 /***** READ-WRITE LOCKS *****/
 805
 806 int __pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *rwlock_attr)
 807 {
 808     assert( funcs.ptr_pthread_rwlock_init );
 809     return funcs.ptr_pthread_rwlock_init( rwlock, rwlock_attr );
 810 }
 811 strong_alias(__pthread_rwlock_init, pthread_rwlock_init);
 812
 813 int __pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
 814 {
 815     assert( funcs.ptr_pthread_rwlock_destroy );
 816     return funcs.ptr_pthread_rwlock_destroy( rwlock );
 817 }
 818 strong_alias(__pthread_rwlock_destroy, pthread_rwlock_destroy);
 819
 820 int __pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 821 {
 822     if (!funcs.ptr_pthread_rwlock_rdlock) return 0;
 823     return funcs.ptr_pthread_rwlock_rdlock( rwlock );
 824 }
 825 strong_alias(__pthread_rwlock_rdlock, pthread_rwlock_rdlock);
 826
 827 int __pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 828 {
 829     assert( funcs.ptr_pthread_rwlock_tryrdlock );
 830     return funcs.ptr_pthread_rwlock_tryrdlock( rwlock );
 831 }
 832 strong_alias(__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock);
 833
 834 int __pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 835 {
 836     assert( funcs.ptr_pthread_rwlock_wrlock );
 837     return funcs.ptr_pthread_rwlock_wrlock( rwlock );
 838 }
 839 strong_alias(__pthread_rwlock_wrlock, pthread_rwlock_wrlock);
 840
 841 int __pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 842 {
 843     assert( funcs.ptr_pthread_rwlock_trywrlock );
 844     return funcs.ptr_pthread_rwlock_trywrlock( rwlock );
 845 }
 846 strong_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock);
 847
 848 int __pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
 849 {
 850     if (!funcs.ptr_pthread_rwlock_unlock) return 0;
 851     return funcs.ptr_pthread_rwlock_unlock( rwlock );
 852 }
 853 strong_alias(__pthread_rwlock_unlock, pthread_rwlock_unlock);
 854
 855 /**** READ-WRITE LOCK ATTRIBUTES *****/
 856 /* not implemented right now */
 857
 858 int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
 859 {
 860   return 0;
 861 }
 862
 863 int __pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
 864 {
 865   return 0;
 866 }
 867 strong_alias(__pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
 868
 869 int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t *attr, int *pref)
 870 {
 871   *pref = 0;
 872   return 0;
 873 }
 874
 875 int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t *attr, int pref)
 876 {
 877   return 0;
 878 }
 879
 880 /***** MISC *****/
 881
 882 pthread_t pthread_self(void)
 883 {
 884     assert( funcs.ptr_pthread_self );
 885     return funcs.ptr_pthread_self();
 886 }
 887
 888 int pthread_equal(pthread_t thread1, pthread_t thread2)
 889 {
 890     assert( funcs.ptr_pthread_equal );
 891     return funcs.ptr_pthread_equal( thread1, thread2 );
 892 }
 893
 894 void __pthread_do_exit(void *retval, char *currentframe)
 895 {
 896     assert( funcs.ptr_pthread_exit );
 897     return funcs.ptr_pthread_exit( retval, currentframe );
 898 }
 899
 900 void __pthread_exit(void *retval)
 901 {
 902     __pthread_do_exit( retval, NULL );
 903 }
 904 strong_alias(__pthread_exit, pthread_exit);
 905
 906 int pthread_setcancelstate(int state, int *oldstate)
 907 {
 908     pthread_descr descr = __pthread_thread_self();
 909     if (oldstate) *oldstate = descr->cancel_state;
 910     descr->cancel_state = state;
 911     return 0;
 912 }
 913
 914 int pthread_setcanceltype(int type, int *oldtype)
 915 {
 916     pthread_descr descr = __pthread_thread_self();
 917     if (oldtype) *oldtype = descr->cancel_type;
 918     descr->cancel_type = type;
 919     return 0;
 920 }
 921
 922 /***** ANTI-OVERRIDES *****/
 923 /* pthreads tries to override these, point them back to libc */
 924
 925 int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 926 {
 927     if (!libc_sigaction)
 928     {
 929         libc_sigaction = dlsym( RTLD_NEXT, "sigaction" );
 930         assert( libc_sigaction );
 931     }
 932     return libc_sigaction(signum, act, oldact);
 933 }
 934
 935 void __pthread_initialize(void)
 936 {
 937     static int done;
 938
 939     if (!done)
 940     {
 941         done = 1;
 942         libc_fork = dlsym( RTLD_NEXT, "fork" );
 943         libc_sigaction = dlsym( RTLD_NEXT, "sigaction" );
 944         libc_uselocale = dlsym( RTLD_NEXT, "uselocale" );
 945         libc_pthread_init = dlsym( RTLD_NEXT, "__libc_pthread_init" );
 946         if (libc_pthread_init) libc_multiple_threads = libc_pthread_init( &libc_pthread_functions );
 947     }
 948 }
 949 DECL_GLOBAL_CONSTRUCTOR(init) { __pthread_initialize(); }
 950
 951 static struct pthread_functions libc_pthread_functions =
 952 {
 953     NULL,                          /* ptr_pthread_fork */
 954     NULL, /* FIXME */              /* ptr_pthread_attr_destroy */
 955     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_0 */
 956     NULL, /* FIXME */              /* ptr___pthread_attr_init_2_1 */
 957     NULL, /* FIXME */              /* ptr_pthread_attr_getdetachstate */
 958     NULL, /* FIXME */              /* ptr_pthread_attr_setdetachstate */
 959     NULL, /* FIXME */              /* ptr_pthread_attr_getinheritsched */
 960     NULL, /* FIXME */              /* ptr_pthread_attr_setinheritsched */
 961     NULL, /* FIXME */              /* ptr_pthread_attr_getschedparam */
 962     pthread_attr_setschedparam,    /* ptr_pthread_attr_setschedparam */
 963     NULL, /* FIXME */              /* ptr_pthread_attr_getschedpolicy */
 964     NULL, /* FIXME */              /* ptr_pthread_attr_setschedpolicy */
 965     NULL, /* FIXME */              /* ptr_pthread_attr_getscope */
 966     NULL, /* FIXME */              /* ptr_pthread_attr_setscope */
 967     pthread_condattr_destroy,      /* ptr_pthread_condattr_destroy */
 968     pthread_condattr_init,         /* ptr_pthread_condattr_init */
 969     __pthread_cond_broadcast,      /* ptr___pthread_cond_broadcast */
 970     __pthread_cond_destroy,        /* ptr___pthread_cond_destroy */
 971     __pthread_cond_init,           /* ptr___pthread_cond_init */
 972     __pthread_cond_signal,         /* ptr___pthread_cond_signal */
 973     __pthread_cond_wait,           /* ptr___pthread_cond_wait */
 974     pthread_equal,                 /* ptr_pthread_equal */
 975     __pthread_exit,                /* ptr___pthread_exit */
 976     NULL, /* FIXME */              /* ptr_pthread_getschedparam */
 977     NULL, /* FIXME */              /* ptr_pthread_setschedparam */
 978     __pthread_mutex_destroy,       /* ptr_pthread_mutex_destroy */
 979     __pthread_mutex_init,          /* ptr_pthread_mutex_init */
 980     __pthread_mutex_lock,          /* ptr_pthread_mutex_lock */
 981     __pthread_mutex_trylock,       /* ptr_pthread_mutex_trylock */
 982     __pthread_mutex_unlock,        /* ptr_pthread_mutex_unlock */
 983     pthread_self,                  /* ptr_pthread_self */
 984     pthread_setcancelstate,        /* ptr_pthread_setcancelstate */
 985     pthread_setcanceltype,         /* ptr_pthread_setcanceltype */
 986     __pthread_do_exit,             /* ptr_pthread_do_exit */
 987     __pthread_cleanup_upto,        /* ptr_pthread_cleanup_upto */
 988     __pthread_thread_self,         /* ptr_pthread_thread_self */
 989     pthread_internal_tsd_set,      /* ptr_pthread_internal_tsd_set */
 990     pthread_internal_tsd_get,      /* ptr_pthread_internal_tsd_get */
 991     pthread_internal_tsd_address,  /* ptr_pthread_internal_tsd_address */
 992     NULL,                          /* ptr_pthread_sigaction */
 993     NULL,                          /* ptr_pthread_sigwait */
 994     NULL,                          /* ptr_pthread_raise */
 995     __pthread_cond_timedwait,      /* ptr___pthread_cond_timedwait */
 996     _pthread_cleanup_push,         /* ptr__pthread_cleanup_push */
 997     _pthread_cleanup_pop           /* ptr__pthread_cleanup_pop */
 998 };
 999
1000 #endif /* __GLIBC__ || __FREEBSD__ */