diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/Makefile.in | 2 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_lock_flags.c | 46 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_lock_flags.h | 74 |
3 files changed, 121 insertions, 1 deletions
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in index ecbf76595b..8b2dd5dbb9 100644 --- a/erts/emulator/Makefile.in +++ b/erts/emulator/Makefile.in @@ -813,7 +813,7 @@ RUN_OBJS = \ $(OBJDIR)/erl_bif_binary.o $(OBJDIR)/erl_ao_firstfit_alloc.o \ $(OBJDIR)/erl_thr_queue.o $(OBJDIR)/erl_sched_spec_pre_alloc.o \ $(OBJDIR)/erl_ptab.o $(OBJDIR)/erl_map.o \ - $(OBJDIR)/erl_msacc.o + $(OBJDIR)/erl_msacc.o $(OBJDIR)/erl_lock_flags.o LTTNG_OBJS = $(OBJDIR)/erlang_lttng.o NIF_OBJS = $(OBJDIR)/erl_tracer_nif.o diff --git a/erts/emulator/beam/erl_lock_flags.c b/erts/emulator/beam/erl_lock_flags.c new file mode 100644 index 0000000000..ba6a7217f2 --- /dev/null +++ b/erts/emulator/beam/erl_lock_flags.c @@ -0,0 +1,46 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2017. All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * %CopyrightEnd% + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "erl_lock_flags.h" + +const char *erts_lock_flags_get_type_name(erts_lock_flags_t flags) { + switch(flags & ERTS_LOCK_FLAGS_MASK_TYPE) { + case ERTS_LOCK_FLAGS_TYPE_PROCLOCK: + return "proclock"; + case ERTS_LOCK_FLAGS_TYPE_MUTEX: + if(flags & ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE) { + return "rw_mutex"; + } + + return "mutex"; + case ERTS_LOCK_FLAGS_TYPE_SPINLOCK: + if(flags & ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE) { + return "rw_spinlock"; + } + + return "spinlock"; + default: + return "garbage"; + } +} diff --git a/erts/emulator/beam/erl_lock_flags.h b/erts/emulator/beam/erl_lock_flags.h new file mode 100644 index 0000000000..b66c160af5 --- /dev/null +++ b/erts/emulator/beam/erl_lock_flags.h @@ -0,0 +1,74 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2017. All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * %CopyrightEnd% + */ + +#ifndef ERTS_LOCK_FLAGS_H__ +#define ERTS_LOCK_FLAGS_H__ + +#define ERTS_LOCK_OPTION_READ (1 << 1) +#define ERTS_LOCK_OPTION_WRITE (1 << 2) + +#define ERTS_LOCK_OPTION_RDWR (ERTS_LOCK_OPTION_READ | ERTS_LOCK_OPTION_WRITE) + +/* Property/category are bitfields to simplify their use in masks. */ +#define ERTS_LOCK_FLAGS_MASK_CATEGORY (0xFFC0) +#define ERTS_LOCK_FLAGS_MASK_PROPERTY (0x0030) + +/* Type is a plain number. */ +#define ERTS_LOCK_FLAGS_MASK_TYPE (0x000F) + +#define ERTS_LOCK_FLAGS_TYPE_SPINLOCK (1) +#define ERTS_LOCK_FLAGS_TYPE_MUTEX (2) +#define ERTS_LOCK_FLAGS_TYPE_PROCLOCK (3) + +/* "Static" guarantees that the lock will never be destroyed once created. */ +#define ERTS_LOCK_FLAGS_PROPERTY_STATIC (1 << 4) +#define ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE (1 << 5) + +#define ERTS_LOCK_FLAGS_CATEGORY_ALLOCATOR (1 << 6) +#define ERTS_LOCK_FLAGS_CATEGORY_PROCESS (1 << 7) +#define ERTS_LOCK_FLAGS_CATEGORY_IO (1 << 8) +#define ERTS_LOCK_FLAGS_CATEGORY_DB (1 << 9) +#define ERTS_LOCK_FLAGS_CATEGORY_DEBUG (1 << 10) +#define ERTS_LOCK_FLAGS_CATEGORY_SCHEDULER (1 << 11) +#define ERTS_LOCK_FLAGS_CATEGORY_GENERIC (1 << 12) +#define ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION (1 << 13) + +#define ERTS_LOCK_TYPE_SPINLOCK \ + (ERTS_LOCK_FLAGS_TYPE_SPINLOCK) +#define ERTS_LOCK_TYPE_RWSPINLOCK \ + (ERTS_LOCK_TYPE_SPINLOCK | \ + ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE) +#define ERTS_LOCK_TYPE_MUTEX \ + (ERTS_LOCK_FLAGS_TYPE_MUTEX) +#define ERTS_LOCK_TYPE_RWMUTEX \ + (ERTS_LOCK_TYPE_MUTEX | \ + ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE) +#define ERTS_LOCK_TYPE_PROCLOCK \ + (ERTS_LOCK_FLAGS_CATEGORY_PROCESS | \ + ERTS_LOCK_FLAGS_TYPE_PROCLOCK) + +/* -- -- */ + +typedef unsigned short erts_lock_flags_t; + +/* @brief Gets the type name of the lock, honoring the RW flag if supplied. */ +const char *erts_lock_flags_get_type_name(erts_lock_flags_t flags); + +#endif /* ERTS_LOCK_FLAGS_H__ */ |