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This BIF solves a problem of float_to_list/1 that doesn't allow
specifying the number of digits after the decimal point when
formatting floats.
float_to_list(Float, Options) -> string()
Float = float()
Options = [Option]
Option = {decimals, Decimals::0..249} |
{scientific, Decimals::0..249} |
compact
Returns a string which corresponds to the text representation of
a `Float` formatted using given options.
When decimals option is specified the returned value will contain
at most `Decimals` number of digits past the decimal point.
When `compact` option is provided the trailing zeros at the end
of the list are truncated (this option is only meaningful together
with the `decimals` option). When `scientific` option is provided,
the float will be formatted using scientific notation with
`Decimals` digits of precision. If `Options` is `[]` the function
behaves like `float_to_list/1`. When using `decimals` option and
the number doesn't fit in the static internal buffer of 256 bytes
the function throws `badarg`.
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rickard/r16/port-optimizations/OTP-10336
* rickard/port-optimizations/OTP-10336:
Change annotate level for emacs-22 in cerl
Update etp-commands
Add documentation on communication in Erlang
Add support for busy port message queue
Add driver callback epilogue
Implement true asynchronous signaling between processes and ports
Add erl_drv_[send|output]_term
Move busy port flag
Use rwlock for driver list
Optimize management of port tasks
Improve configuration of process and port tables
Remove R9 compatibility features
Use ptab functionality also for ports
Prepare for use of ptab functionality also for ports
Atomic port state
Generalize process table implementation
Implement functionality for delaying thread progress from unmanaged threads
Conflicts:
erts/doc/src/erl_driver.xml
erts/doc/src/erlang.xml
erts/emulator/beam/beam_bif_load.c
erts/emulator/beam/beam_bp.c
erts/emulator/beam/beam_emu.c
erts/emulator/beam/bif.c
erts/emulator/beam/copy.c
erts/emulator/beam/erl_alloc.c
erts/emulator/beam/erl_alloc.types
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_bif_port.c
erts/emulator/beam/erl_bif_trace.c
erts/emulator/beam/erl_init.c
erts/emulator/beam/erl_message.c
erts/emulator/beam/erl_port_task.c
erts/emulator/beam/erl_process.c
erts/emulator/beam/erl_process.h
erts/emulator/beam/erl_process_lock.c
erts/emulator/beam/erl_trace.c
erts/emulator/beam/export.h
erts/emulator/beam/global.h
erts/emulator/beam/io.c
erts/emulator/sys/unix/sys.c
erts/emulator/sys/vxworks/sys.c
erts/emulator/test/port_SUITE.erl
erts/etc/unix/cerl.src
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/prim_inet.beam
erts/preloaded/src/prim_inet.erl
lib/hipe/cerl/erl_bif_types.erl
lib/kernel/doc/src/inet.xml
lib/kernel/src/inet.erl
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Conflicts:
erts/emulator/sys/vxworks/sys.c
erts/vsn.mk
lib/ssl/src/ssl_connection.erl
lib/ssl/test/ssl_basic_SUITE.erl
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* Create an erl_crash.dump if no heart exists
and no ERL_CRASH_DUMP_SECONDS is set (behaviour changed)
* Don't create an erl_crash.dump if heart do exists
and no ERL_CRASH_DUMP_SECONDS is set (behaviour not changed)
This changes the behaviour back to the R15B02 default considering
if a beam was running with no heart.
The motivation is that we want a fast heart to fast restart erlang if
it crashes but to be able to get non-truncated erl_crash.dumps via
setting ERL_CRASH_DUMP_SECONDS if we so desire.
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* sverk/crypto-unloading:
crypto: Link crypto_callback statically
crypto: Add debug print macros
crypto: Enable runtime upgrade of crypto
crypto: Make unloading of crypto safer
OTP-10596
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Conflicts:
erts/etc/common/heart.c
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* egil/ensure-erl_crash.dump/OTP-10422:
test: Relax timeouts for heart_SUITE
erts: Fix crash dump write to port hack
erts: Fix lock check assertion
doc: Document ERL_CRASH_DUMP_SECONDS behaviour
test: Add test for heart restart on crash
test: Add test for heart restart on crash
erts: Change ERL_CRASH_DUMP_SECONDS behaviour
test: Refactor away ?line macros in heart_SUITE
erts: Search for heart in ports that are alive
heart: Refactor heart debugging
erts, heart: Ensure erl_crash.dump is written
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Not setting ERL_CRASH_DUMP_SECONDS will now terminate beam
immediately on a crash without writing a crash dump file.
Setting ERL_CRASH_DUMP_SECONDS to 0 will also terminate beam
immediately on a crash without writing a crash dump file, i.e. same as not
setting ERL_CRASH_DUMP_SECONDS environment variable.
Setting ERL_CRASH_DUMP_SECONDS to a negative value will let the beam wait
indefinitely on the crash dump file being written.
Setting ERL_CRASH_DUMP_SECONDS to a positive value will let the beam wait
that many seconds on the crash dump file being written.
A positive value will set both an alarm in beam AND a heart timeout for restart
if heart is running.
This is due to the change of 'heart' behavior when 'heart' is
listening for a crash.
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When a crash dump is about to be written and we have
heartbeat enabled on a system. We need time to write it
before heart explicitly kills the beam.
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Facts:
crypto nif-lib registers callback functions that openssl uses
for memory management and thread synchronization. The callback
functions can only be set once, openssl does not allow changing the
callback functions.
Problem:
If openssl is dynamicly linked to crypto, you might get s scenario
where the crypto lib is unloaded while leaving openssl loaded
with its old pointers to the unloaded crypto code intact.
If crypto is then reloaded (by init:restart() for example), the crypto
nif-lib might get relocated at a different address. crypto calls
openssl which in turn calls the old invalid callback functions...kaboom.
Solution:
Break apart the callback functions into a separate dynamic lib that
crypto loads with dlopen. When crypto is unloaded the callback lib is
left in place to be reused if/when crypto is loaded again.
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* egil/r16/strengthen-buffer-copies:
Replace sprintf with erts_snprintf in beam
Replace sprintf with erts_snprintf in epmd
Replace sprintf with erts_snprintf in inet_gethost
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* maint:
Make sure io is flushed when driver is closed
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Sometime when executing an tty io operation just before
the emulator terminated, the io message would get lost.
This commit makes sure that there is no io in the fd driver
before shutting down.
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Conflicts:
lib/diameter/autoconf/vxworks/sed.general
xcomp/README.md
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* jkl/erlsrv-graceful-shutdown/OTP-10228:
erlsrv: gracefully stop emulator on Windows shutdown
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Conflicts:
erts/doc/src/erlang.xml
erts/preloaded/ebin/init.beam
lib/kernel/doc/src/os.xml
lib/stdlib/test/filename_SUITE.erl
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Putenv and getenv needs to convert to the proper environment
strings in Unicode depending on platform and user settings for filename
encoding. Also erlexec needs to pass environment strings in an appropriate
way for kernel to pick up. All environment strings on the command
line, as well as home directory, is now passed in UTF8 on windows
and in whatever encoding you have on Unix, kernel tries to convert all
parameters and environments from UTF8 before making strings.
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Windows will send the SERVICE_CONTROL_SHUTDOWN event to the service control
handler when shutting down the system. Instead of ignoring the event, erlsrv
will now invoke the stop action. Likewise, the Erlang emulator (and it's port
drivers) must not quit upon reception of the CTRL_SHUTDOWN_EVENT event in the
console control handler.
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* rickard/proc-sched/OTP-9892:
Teach etp-commands to understand new emulator internal data structures
Optimize process state changes
Optimize process table access
Implement possibility to use ordinary mutexes as process locks
Conflicts:
erts/emulator/beam/erl_alloc.types
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* raimo/64-bit-driver-api/OTP-9795: (22 commits)
driver_SUITE.erl: Fix sys info drivers
emulator test drivers: Conform to updated driver API
runtime_tools's drivers: Conform to updated driver API
ws's xwe_driver.c: Conform to updated driver API
megaco's flex scanner: Conform to updated driver API
seq_trace_SUITE_data/echo_drv.c: Conform to updated driver API
erl_interface tests: Conform port_call_drv.c updated driver API
erl_drv_thread_SUITE_data/testcase_driver.c: Conform to updated driver API
float_SUITE_data/fp_drv.c: Conform to updated driver API
port_SUITE_data/*_drv.c: Conform to updated driver API
port_bif_SUITE_data/control_drv.c: Conform to updated driver API
send_term_SUITE_data/send_term_drv.c: Conform to updated driver API
system_profile_SUITE_data/echo_drv.c: Conform to updated driver API
trace_port_SUITE_data/echo_drv.c: Conform to updated driver API
Remove support for old drivers without ERL_DRV_EXTENDED_MARKER
built-in drivers: Add ERL_DRV_EXTENDED_MARKER and version numbers
Bump driver version to 2.0
erl_driver.h: Enlarge type on return value from call
erl_driver.h: Enlarge types on driver callbacks output, control and call
erl_driver.h: Enlarge types in driver output functions
...
Conflicts:
erts/emulator/test/driver_SUITE_data/monitor_drv.c
erts/emulator/test/driver_SUITE_data/timer_drv.c
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* egil/file-info-opt-utc/OTP-7687: (39 commits)
Remove time_t specific test in prim_file_SUITE
Update prim_file.beam and prim_zip.beam
Add types for posixtime_to_universaltime and the reverse
Set BASEYEAR to 1902
Set lower limit of years handled to 1601
Emulate localtime, gmtime and mktime to enable negative time_t
Document file:*_file_info/2
Fix compiler warning in unix_efile.c
Change name of bif universaltime_to_seconds/1
Change options to prim_file:*_file_info/*
Remove dead code
Catch errors from prim_file:*_file_info
Testcase for utc <-> seconds conversion
Fix negative time in seconds_to_universaltime/1
Remove OS taint from datetime conversion
Add utc <-> seconds conversions bifs
Let prim_file validate ctime in file_info
Teach #file_info spec unix epochs for file times
Add file_info_opt tests in prim_file_SUITE
unix_efile: Zero is a valid number in utime
...
Conflicts:
erts/emulator/beam/erl_time_sup.c
erts/emulator/sys/win32/erl_win_sys.h
erts/emulator/sys/win32/sys_time.c
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Almost all uses of the 'long' datatype is removed from VM and tests
Emulator test now runs w/o drivers crashing
Nasty abs bug fixed in VM as well as type errors in allocator debug functions
Still one allocator test that fails, domain knowledge is needed to fix that.
Fix type inconsistency in beam_load causing crashes
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Still does not run, just compiles.
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Windows native critical sections are now used internally in the
runtime system as mutex implementation. This since they perform
better under extreme contention than our own implementation.
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Queues used for communication between async threads and scheduler threads
have been replaced with lock-free queues.
Drivers using the driver_async functionality are not automatically locked
to the system anymore, and can be unloaded as any dynamically linked in
driver.
Scheduling of ready async jobs is now also interleaved in between other
jobs. Previously all ready async jobs was performed at once.
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The ERTS internal system block functionality has been replaced by
new functionality for blocking the system. The old system block
functionality had contention issues and complexity issues. The
new functionality piggy-backs on thread progress tracking functionality
needed by newly introduced lock-free synchronization in the runtime
system. When the functionality for blocking the system isn't used
there is more or less no overhead at all. This since the functionality
for tracking thread progress is there and needed anyway.
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A number of memory allocation optimizations have been implemented. Most
optimizations reduce contention caused by synchronization between
threads during allocation and deallocation of memory. Most notably:
* Synchronization of memory management in scheduler specific allocator
instances has been rewritten to use lock-free synchronization.
* Synchronization of memory management in scheduler specific
pre-allocators has been rewritten to use lock-free synchronization.
* The 'mseg_alloc' memory segment allocator now use scheduler specific
instances instead of one instance. Apart from reducing contention
this also ensures that memory allocators always create memory
segments on the local NUMA node on a NUMA system.
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Conflicts:
erts/aclocal.m4
erts/emulator/beam/erl_db.c
erts/emulator/sys/win32/sys.c
erts/include/internal/ethread_header_config.h.in
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* ta/docs-fixes:
Fix misspelling of intermediate
Fix typos in erts/preloaded/src
Fix more misspellings of compatibility
Fix misspelling of kept
Fix misspelling of compatibility in ssl_basic_SUITE
Fix misspelling of compatibility
Fix misspelling of accommodate
Fix misspelling of exceed
Fix misspelling of accidentally
Fix misspelling of erroneous in xmerl_xsd
Fix misspelling of erroneous
Fix misspelling of successful
Fix typos in instrument(3)
Fix typos in dbg(3)
dialyzer: fix a small typo in list_to_bitstring test
Fix typos in cover.erl
Fix typos (variable name) in erl_nif(3)
Fix typos in mod_esi(3)
Fix trivial typos in erlang(3)
OTP-9555
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All uses of the old deprecated atomic API in the runtime system
have been replaced with the use of the new atomic API. In a lot of
places this change imply a relaxation of memory barriers used.
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Make sure that we don't have to wait in poll before break
handling is done.
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