Introduce a new time API

The old time API is based on erlang:now/0. The major issue with
erlang:now/0 is that it was intended to be used for so many
unrelated things. This tied these unrelated operations together
and unnecessarily caused performance, scalability as well as
accuracy, and precision issues for operations that do not need
to have such issues. The new API spreads different functionality
over multiple functions in order to improve on this.

The new API consists of a number of new BIFs:
- erlang:convert_time_unit/3
- erlang:monotonic_time/0
- erlang:monotonic_time/1
- erlang:system_time/0
- erlang:system_time/1
- erlang:time_offset/0
- erlang:time_offset/1
- erlang:timestamp/0
- erlang:unique_integer/0
- erlang:unique_integer/1
- os:system_time/0
- os:system_time/1

and a number of extensions of existing BIFs:
- erlang:monitor(time_offset, clock_service)
- erlang:system_flag(time_offset, finalize)
- erlang:system_info(os_monotonic_time_source)
- erlang:system_info(time_offset)
- erlang:system_info(time_warp_mode)
- erlang:system_info(time_correction)
- erlang:system_info(start_time)

See the "Time and Time Correction in Erlang" chapter of the
ERTS User's Guide for more information.

1 files changed, 20 insertions, 0 deletions

diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index e68b8e6274..db8feb681b 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -92,6 +92,8 @@ bif erlang:loaded/0
 bif erlang:localtime/0
 bif erlang:localtime_to_universaltime/2
 bif erlang:make_ref/0
+bif erlang:unique_integer/0
+bif erlang:unique_integer/1
 bif erlang:md5/1
 bif erlang:md5_init/0
 bif erlang:md5_update/2
@@ -104,6 +106,13 @@ ubif erlang:node/1
 ubif erlang:node/0
 bif erlang:nodes/1
 bif erlang:now/0
+bif erlang:monotonic_time/0
+bif erlang:monotonic_time/1
+bif erlang:system_time/0
+bif erlang:system_time/1
+bif erlang:time_offset/0
+bif erlang:time_offset/1
+bif erlang:timestamp/0
 
 bif erlang:open_port/2
 
@@ -158,6 +167,15 @@ bif erts_internal:check_process_code/2
 
 bif erts_internal:map_to_tuple_keys/1
 
+bif erts_internal:time_unit/0
+
+bif erts_internal:get_bif_timer_servers/0
+bif erts_internal:create_bif_timer/0
+bif erts_internal:access_bif_timer/1
+
+bif erts_internal:monitor_process/2
+bif erts_internal:is_system_process/1
+
 # inet_db support
 bif erlang:port_set_data/2
 bif erlang:port_get_data/1
@@ -347,6 +365,8 @@ bif os:getenv/0
 bif os:getenv/1
 bif os:getpid/0
 bif os:timestamp/0
+bif os:system_time/0
+bif os:system_time/1
 
 #
 # Bifs in the erl_ddll module (the module actually does not exist)