| 1 | /*
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| 2 | * Copyright (c) 2007 Jakub Jermar
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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_TLS_H_
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| 36 | #define _LIBC_TLS_H_
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| 37 |
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| 38 | #include <libarch/tls.h>
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| 39 | #include <stdbool.h>
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| 40 | #include <stddef.h>
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| 41 | #include <stdint.h>
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| 42 |
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| 43 | static inline void __tcb_reset(void)
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| 44 | {
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| 45 | __tcb_raw_set(NULL);
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| 46 | }
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| 47 |
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| 48 | static inline void __tcb_set(tcb_t *tcb)
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| 49 | {
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| 50 | __tcb_raw_set((uint8_t *)tcb + ARCH_TP_OFFSET);
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| 51 | }
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| 52 |
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| 53 | static inline tcb_t *__tcb_get(void)
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| 54 | {
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| 55 | return (tcb_t *)((uint8_t *)__tcb_raw_get() - ARCH_TP_OFFSET);
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| 56 | }
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| 57 |
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| 58 | /*
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| 59 | * The TP register is supposed to be zero when the thread is first created
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| 60 | * by the kernel. We use this for some debugging assertions.
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| 61 | */
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| 62 | static inline bool __tcb_is_set(void)
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| 63 | {
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| 64 | return __tcb_raw_get() != NULL;
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| 65 | }
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| 66 |
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| 67 | /** DTV Generation number - equals vector length */
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| 68 | #define DTV_GN(dtv) (((uintptr_t *)(dtv))[0])
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| 69 |
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| 70 | extern tcb_t *tls_make(const void *);
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| 71 | extern tcb_t *tls_make_initial(const void *);
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| 72 | extern tcb_t *tls_alloc_arch(size_t, size_t);
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| 73 | extern void tls_free(tcb_t *);
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| 74 | extern void tls_free_arch(tcb_t *, size_t, size_t);
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| 75 | extern void *tls_get(void);
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| 76 |
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| 77 | #ifdef CONFIG_TLS_VARIANT_1
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| 78 | extern tcb_t *tls_alloc_variant_1(size_t, size_t);
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| 79 | extern void tls_free_variant_1(tcb_t *, size_t, size_t);
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| 80 | #endif
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| 81 |
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| 82 | #ifdef CONFIG_TLS_VARIANT_2
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| 83 | extern tcb_t *tls_alloc_variant_2(size_t, size_t);
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| 84 | extern void tls_free_variant_2(tcb_t *, size_t, size_t);
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| 85 | #endif
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| 86 |
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| 87 | #endif
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| 88 |
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| 89 | /** @}
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| 90 | */
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