diff options
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/atomics/pthread/stdatomic.c | 39 | ||||
| -rw-r--r-- | compat/atomics/pthread/stdatomic.h | 197 |
2 files changed, 236 insertions, 0 deletions
diff --git a/compat/atomics/pthread/stdatomic.c b/compat/atomics/pthread/stdatomic.c new file mode 100644 index 0000000..0d1ecfe --- /dev/null +++ b/compat/atomics/pthread/stdatomic.c @@ -0,0 +1,39 @@ +/* + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * based on vlc_atomic.h from VLC + * Copyright (C) 2010 Rémi Denis-Courmont + */ + +#include <pthread.h> +#include <stdint.h> + +#include "stdatomic.h" + +static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER; + +void avpriv_atomic_lock(void) +{ + pthread_mutex_lock(&atomic_lock); +} + +void avpriv_atomic_unlock(void) +{ + pthread_mutex_unlock(&atomic_lock); +} diff --git a/compat/atomics/pthread/stdatomic.h b/compat/atomics/pthread/stdatomic.h new file mode 100644 index 0000000..a4aa9bb --- /dev/null +++ b/compat/atomics/pthread/stdatomic.h @@ -0,0 +1,197 @@ +/* + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * based on vlc_atomic.h from VLC + * Copyright (C) 2010 Rémi Denis-Courmont + */ + +#ifndef LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H +#define LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H + +#include <stdint.h> + +#define ATOMIC_FLAG_INIT 0 + +#define ATOMIC_VAR_INIT(value) (value) + +#define atomic_init(obj, value) \ +do { \ + *(obj) = (value); \ +} while(0) + +#define kill_dependency(y) ((void)0) + +#define atomic_signal_fence(order) \ + ((void)0) + +#define atomic_is_lock_free(obj) 0 + +typedef intptr_t atomic_flag; +typedef intptr_t atomic_bool; +typedef intptr_t atomic_char; +typedef intptr_t atomic_schar; +typedef intptr_t atomic_uchar; +typedef intptr_t atomic_short; +typedef intptr_t atomic_ushort; +typedef intptr_t atomic_int; +typedef intptr_t atomic_uint; +typedef intptr_t atomic_long; +typedef intptr_t atomic_ulong; +typedef intptr_t atomic_llong; +typedef intptr_t atomic_ullong; +typedef intptr_t atomic_wchar_t; +typedef intptr_t atomic_int_least8_t; +typedef intptr_t atomic_uint_least8_t; +typedef intptr_t atomic_int_least16_t; +typedef intptr_t atomic_uint_least16_t; +typedef intptr_t atomic_int_least32_t; +typedef intptr_t atomic_uint_least32_t; +typedef intptr_t atomic_int_least64_t; +typedef intptr_t atomic_uint_least64_t; +typedef intptr_t atomic_int_fast8_t; +typedef intptr_t atomic_uint_fast8_t; +typedef intptr_t atomic_int_fast16_t; +typedef intptr_t atomic_uint_fast16_t; +typedef intptr_t atomic_int_fast32_t; +typedef intptr_t atomic_uint_fast32_t; +typedef intptr_t atomic_int_fast64_t; +typedef intptr_t atomic_uint_fast64_t; +typedef intptr_t atomic_intptr_t; +typedef intptr_t atomic_uintptr_t; +typedef intptr_t atomic_size_t; +typedef intptr_t atomic_ptrdiff_t; +typedef intptr_t atomic_intmax_t; +typedef intptr_t atomic_uintmax_t; + +void avpriv_atomic_lock(void); +void avpriv_atomic_unlock(void); + +static inline void atomic_thread_fence(int order) +{ + avpriv_atomic_lock(); + avpriv_atomic_unlock(); +} + +static inline void atomic_store(intptr_t *object, intptr_t desired) +{ + avpriv_atomic_lock(); + *object = desired; + avpriv_atomic_unlock(); +} + +#define atomic_store_explicit(object, desired, order) \ + atomic_store(object, desired) + +static inline intptr_t atomic_load(intptr_t *object) +{ + intptr_t ret; + avpriv_atomic_lock(); + ret = *object; + avpriv_atomic_unlock(); + return ret; +} + +#define atomic_load_explicit(object, order) \ + atomic_load(object) + +static inline intptr_t atomic_exchange(intptr_t *object, intptr_t desired) +{ + intptr_t ret; + avpriv_atomic_lock(); + ret = *object; + *object = desired; + avpriv_atomic_unlock(); + return ret; +} + +#define atomic_exchange_explicit(object, desired, order) \ + atomic_exchange(object, desired) + +static inline int atomic_compare_exchange_strong(intptr_t *object, intptr_t *expected, + intptr_t desired) +{ + int ret; + avpriv_atomic_lock(); + if (*object == *expected) { + ret = 1; + *object = desired; + } else { + ret = 0; + *expected = *object; + } + avpriv_atomic_unlock(); + return ret; +} + +#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \ + atomic_compare_exchange_strong(object, expected, desired) + +#define atomic_compare_exchange_weak(object, expected, desired) \ + atomic_compare_exchange_strong(object, expected, desired) + +#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \ + atomic_compare_exchange_weak(object, expected, desired) + +#define FETCH_MODIFY(opname, op) \ +static inline intptr_t atomic_fetch_ ## opname(intptr_t *object, intptr_t operand) \ +{ \ + intptr_t ret; \ + avpriv_atomic_lock(); \ + ret = *object; \ + *object = *object op operand; \ + avpriv_atomic_unlock(); \ + return ret; \ +} + +FETCH_MODIFY(add, +) +FETCH_MODIFY(sub, -) +FETCH_MODIFY(or, |) +FETCH_MODIFY(xor, ^) +FETCH_MODIFY(and, &) + +#undef FETCH_MODIFY + +#define atomic_fetch_add_explicit(object, operand, order) \ + atomic_fetch_add(object, operand) + +#define atomic_fetch_sub_explicit(object, operand, order) \ + atomic_fetch_sub(object, operand) + +#define atomic_fetch_or_explicit(object, operand, order) \ + atomic_fetch_or(object, operand) + +#define atomic_fetch_xor_explicit(object, operand, order) \ + atomic_fetch_sub(object, operand) + +#define atomic_fetch_and_explicit(object, operand, order) \ + atomic_fetch_and(object, operand) + +#define atomic_flag_test_and_set(object) \ + atomic_exchange(object, 1) + +#define atomic_flag_test_and_set_explicit(object, order) \ + atomic_flag_test_and_set(object) + +#define atomic_flag_clear(object) \ + atomic_store(object, 0) + +#define atomic_flag_clear_explicit(object, order) \ + atomic_flag_clear(object) + +#endif /* LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H */ |
