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  1. /*
  2.  * Copyright (c) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup libc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef LIBC_FIBRIL_H_
  36. #define LIBC_FIBRIL_H_
  37.  
  38. #include <libarch/fibril.h>
  39. #include <libadt/list.h>
  40. #include <libarch/thread.h>
  41.  
  42. #ifndef context_set
  43. #define context_set(c, _pc, stack, size, ptls)          \
  44.     (c)->pc = (sysarg_t) (_pc);             \
  45.     (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
  46.         (c)->tls = (sysarg_t) (ptls);
  47. #endif /* context_set */
  48.  
  49. #define FIBRIL_SERIALIZED   1
  50.  
  51. typedef enum {
  52.     FIBRIL_SLEEP,
  53.     FIBRIL_PREEMPT,
  54.     FIBRIL_TO_MANAGER,
  55.     FIBRIL_FROM_MANAGER,
  56.     FIBRIL_FROM_DEAD
  57. } fibril_switch_type_t;
  58.  
  59. typedef sysarg_t fid_t;
  60.  
  61. struct fibril {
  62.     link_t link;
  63.     context_t ctx;
  64.     void *stack;
  65.     void *arg;
  66.     int (*func)(void *);
  67.     tcb_t *tcb;
  68.  
  69.     struct fibril *clean_after_me;
  70.     struct fibril *joiner;
  71.     int joinee_retval;
  72.     int retval;
  73.     int flags;
  74. };
  75. typedef struct fibril fibril_t;
  76.  
  77. extern int context_save(context_t *c);
  78. extern void context_restore(context_t *c) __attribute__ ((noreturn));
  79.  
  80. extern fid_t fibril_create(int (*func)(void *), void *arg);
  81. extern int fibril_join(fid_t fid);
  82. extern fibril_t *fibril_setup(void);
  83. extern void fibril_teardown(fibril_t *f);
  84. extern int fibril_schedule_next_adv(fibril_switch_type_t stype);
  85. extern void fibril_add_ready(fid_t fid);
  86. extern void fibril_add_manager(fid_t fid);
  87. extern void fibril_remove_manager(void);
  88. extern fid_t fibril_get_id(void);
  89. extern void fibril_inc_sercount(void);
  90. extern void fibril_dec_sercount(void);
  91.  
  92. static inline int fibril_schedule_next(void) {
  93.     return fibril_schedule_next_adv(FIBRIL_PREEMPT);
  94. }
  95.  
  96. #endif
  97.  
  98. /** @}
  99.  */
  100.