Based on API interface files (sha:77a27212b563299959fb2a609b86bb9117a8f918).
Signed-off-by: Christophe Milard <[email protected]> --- include/odp_drv.h | 1 + platform/linux-generic/Makefile.am | 5 ++- platform/linux-generic/drv_spinlock.c | 39 ++++++++++++++++++++++ .../include/odp/drv/plat/spinlock_types.h | 33 ++++++++++++++++++ platform/linux-generic/include/odp/drv/spinlock.h | 28 ++++++++++++++++ 5 files changed, 105 insertions(+), 1 deletion(-) create mode 100644 platform/linux-generic/drv_spinlock.c create mode 100644 platform/linux-generic/include/odp/drv/plat/spinlock_types.h create mode 100644 platform/linux-generic/include/odp/drv/spinlock.h diff --git a/include/odp_drv.h b/include/odp_drv.h index 35e070c..776cf12 100644 --- a/include/odp_drv.h +++ b/include/odp_drv.h @@ -22,6 +22,7 @@ extern C { #include <odp/drv/atomic.h> #include <odp/drv/byteorder.h> #include <odp/drv/compiler.h> +#include <odp/drv/spinlock.h> #include <odp/drv/std_types.h> #include <odp/drv/sync.h> diff --git a/platform/linux-generic/Makefile.am b/platform/linux-generic/Makefile.am index 109b42e..6bd95a3 100644 --- a/platform/linux-generic/Makefile.am +++ b/platform/linux-generic/Makefile.am @@ -97,13 +97,15 @@ odpdrvinclude_HEADERS = \ $(srcdir)/include/odp/drv/atomic.h \ $(srcdir)/include/odp/drv/byteorder.h \ $(srcdir)/include/odp/drv/compiler.h \ + $(srcdir)/include/odp/drv/spinlock.h \ $(srcdir)/include/odp/drv/std_types.h \ $(srcdir)/include/odp/drv/sync.h odpdrvplatincludedir = $(includedir)/odp/drv/plat odpdrvplatinclude_HEADERS = \ $(srcdir)/include/odp/drv/plat/atomic_types.h \ - $(srcdir)/include/odp/drv/plat/byteorder_types.h + $(srcdir)/include/odp/drv/plat/byteorder_types.h \ + $(srcdir)/include/odp/drv/plat/spinlock_types.h noinst_HEADERS = \ ${srcdir}/include/odp_align_internal.h \ @@ -201,6 +203,7 @@ __LIB__libodp_linux_la_SOURCES = \ odp_version.c \ odp_weak.c \ drv_atomic.c \ + drv_spinlock.c \ arch/@ARCH_DIR@/odp_cpu_arch.c \ arch/@ARCH_DIR@/odp_sysinfo_parse.c diff --git a/platform/linux-generic/drv_spinlock.c b/platform/linux-generic/drv_spinlock.c new file mode 100644 index 0000000..69e3da7 --- /dev/null +++ b/platform/linux-generic/drv_spinlock.c @@ -0,0 +1,39 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <odp/drv/spinlock.h> +#include <odp_atomic_internal.h> + +void odpdrv_spinlock_init(odpdrv_spinlock_t *spinlock) +{ + _odp_atomic_flag_init(&spinlock->lock, 0); +} + +void odpdrv_spinlock_lock(odpdrv_spinlock_t *spinlock) +{ + /* While the lock is already taken... */ + while (_odp_atomic_flag_tas(&spinlock->lock)) + /* ...spin reading the flag (relaxed MM), + * the loop will exit when the lock becomes available + * and we will retry the TAS operation above */ + while (_odp_atomic_flag_load(&spinlock->lock)) + odp_cpu_pause(); +} + +int odpdrv_spinlock_trylock(odpdrv_spinlock_t *spinlock) +{ + return (_odp_atomic_flag_tas(&spinlock->lock) == 0); +} + +void odpdrv_spinlock_unlock(odpdrv_spinlock_t *spinlock) +{ + _odp_atomic_flag_clear(&spinlock->lock); +} + +int odpdrv_spinlock_is_locked(odpdrv_spinlock_t *spinlock) +{ + return _odp_atomic_flag_load(&spinlock->lock) != 0; +} diff --git a/platform/linux-generic/include/odp/drv/plat/spinlock_types.h b/platform/linux-generic/include/odp/drv/plat/spinlock_types.h new file mode 100644 index 0000000..41dd9ac --- /dev/null +++ b/platform/linux-generic/include/odp/drv/plat/spinlock_types.h @@ -0,0 +1,33 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODPDRV spinlock + */ + +#ifndef ODPDRV_SPINLOCK_TYPES_H_ +#define ODPDRV_SPINLOCK_TYPES_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <odp/drv/std_types.h> + +/** @internal */ +struct odpdrv_spinlock_s { + char lock; /**< lock flag, should match odpdrv_atomic_flag_t */ +}; + +typedef struct odpdrv_spinlock_s odpdrv_spinlock_t; + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/platform/linux-generic/include/odp/drv/spinlock.h b/platform/linux-generic/include/odp/drv/spinlock.h new file mode 100644 index 0000000..dd05f8c --- /dev/null +++ b/platform/linux-generic/include/odp/drv/spinlock.h @@ -0,0 +1,28 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODPDRV spinlock + */ + +#ifndef ODPDRV_PLAT_SPINLOCK_H_ +#define ODPDRV_PLAT_SPINLOCK_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <odp/drv/plat/spinlock_types.h> + +#include <odp/drv/spec/spinlock.h> + +#ifdef __cplusplus +} +#endif + +#endif -- 2.7.4
