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