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The scheduler wakeup threshold is now possible to adjust at system boot.
For more information see the `+swt' command line argument of `erl'.
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Added erlang:system_info(build_type) which makes it
easier to chose drivers, NIF libraries, etc based
on build type of the runtime system.
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ArgumentList -> Args
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* sverker/NIF-64bit-integers/OTP-8746:
Make windows 64bit types be declared more consistently
Teach Windows about the int64 functions
NIF doc official support note
NIF 64-bit integer support
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* rickard/cpu-info/OTP-8765:
Initialize environment functionality after thread lib
Fix faulty assertions
Implement automatic detection of CPU topology on Windows
Make it possible to reread and update detected CPU information
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The CPU topology is now automatically detected on Windows
systems with less than 33 logical processors. The runtime system
will now, also on Windows, by default bind schedulers to logical
processors using the 'default_bind' bind type if the amount of
schedulers is at least equal to the amount of logical processors
configured, binding of schedulers is supported, and a CPU topology
is available at startup.
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* bjorn/remove-elib_malloc/OTP-8764:
erts: Remove broken elib_malloc
erts: Remove the unused mem_drv driver
erts: Remove stray pre-ISO-C compatibility macros
erts: Remove unused decl.h
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* hb/type_reference/OTP-8733:
reference() substituted for ref() in docs
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Calling erlang:system_info/1 with the new argument 'update_cpu_info'
will make the runtime system reread and update the internally stored
CPU information. For more information see the documentation of
erlang:system_info(update_cpu_info).
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elib_malloc is an alternate memory allocator that
is no longer possible to build.
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* rickard/ethread-rewrite/OTP-8544:
Rewrite ethread library
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Large parts of the ethread library have been rewritten. The
ethread library is an Erlang runtime system internal, portable
thread library used by the runtime system itself.
Most notable improvement is a reader optimized rwlock
implementation which dramatically improve the performance of
read-lock/read-unlock operations on multi processor systems by
avoiding ping-ponging of the rwlock cache lines. The reader
optimized rwlock implementation is used by miscellaneous
rwlocks in the runtime system that are known to be read-locked
frequently, and can be enabled on ETS tables by passing the
`{read_concurrency, true}' option upon table creation. See the
documentation of `ets:new/2' for more information.
The ethread library can now also use the libatomic_ops library
for atomic memory accesses. This makes it possible for the
Erlang runtime system to utilize optimized atomic operations
on more platforms than before. Use the
`--with-libatomic_ops=PATH' configure command line argument
when specifying where the libatomic_ops installation is
located. The libatomic_ops library can be downloaded from:
http://www.hpl.hp.com/research/linux/atomic_ops/
The changed API of the ethread library has also caused
modifications in the Erlang runtime system. Preparations for
the to come "delayed deallocation" feature has also been done
since it depends on the ethread library.
Note: When building for x86, the ethread library will now use
instructions that first appeared on the pentium 4 processor. If
you want the runtime system to be compatible with older
processors (back to 486) you need to pass the
`--enable-ethread-pre-pentium4-compatibility' configure command
line argument when configuring the system.
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Final merge of all unexpected differences from dev to release.
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A user defined CPU topology set via a call to <seealso
marker="erlang#system_flag_cpu_topology">erlang:system_flag(cpu_topology,
CPUTopology)</seealso> was not properly verified, and could in worst case
cause an emulator crash. The emulator crash could only occur when a user
defined CPU topology already existed and was redefined.
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* pan/otp_8669_doc_autoimported:
Change documentation for erlang:min/2,max/2 and port_command/3 to
OTP-8669 erlang:min, erlang:max and erlang:port_command/3 autoimported
The recently added BIFs erlang:min/2, erlang:max/2 and
erlang:port_command/3 are now auto-imported (as they were originally
intended to be). Due to the recent compiler change (OTP-8579), the only
impact on old code defining it's own min/2, max/2 or port_command/3
functions will be a warning, the local functions will still be used. The
warning can be removed by using
-compile({no_auto_import,[min/2,max/2,port_command/3]}). in the source
file.
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* commit 'bg/nif_error':
crypto: Add type specs for all documented functions
crypto: Use erlang:nif_error/1 to squelch false Dialyzer warnings
Add erlang:nif_error/1,2
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reflect auto-import
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Documented call time breakpoints in
- erlang:trace_pattern/3
- erlang:trace_info/2
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The runtime system will by default bind schedulers to logical processors
using the default_bind bind type if the amount of schedulers are at least
equal to the amount of logical processors configured, binding of schedulers
is supported, and a CPU topology is available at startup.
NOTE: If the Erlang runtime system is the only operating system process
that binds threads to logical processors, this improves the performance of
the runtime system. However, if other operating system processes (as for
example another Erlang runtime system) also bind threads to logical
processors, there might be a performance penalty instead. If this is the
case you, are are advised to unbind the schedulers using the <seealso
marker="erl#+sbt">+sbtu</seealso> command line argument, or by invoking
<seealso
marker="erlang#system_flag_scheduler_bind_type">erlang:system_flag(schedule
r_bind_type, unbound)</seealso>.
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New NIF features:
Send messages from a NIF, or from thread created by NIF, to any local
process (enif_send)
Store terms between NIF calls (enif_alloc_env, enif_make_copy)
Create binary terms with user defined memory management
(enif_make_resource_binary)
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* pan/otp_8086_ms_grammar:
Add match_specification grammar documentation specifically for ets
OTP-8086 Grammar for match specification describes tracing only
The grammar for match specifications in ERTS users guide only described the
tracing dialect of match specifications. An informal grammar for the ETS
dialect is added.
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* jv/autoimport-binary_to_term_2:
Change binary_to_term/2 to be auto-imported
OTP-8671 jv/autoimport-binary_to_term_2
Now, binary_to_term/2 is auto-imported. This will cause a compile warning
if and only if a module has got a local function with that name.
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A stub function that is supposed to be replaced by a NIF usually
calls erlang:error/1 to cause an exception if the NIF library
is not loaded. For example:
foo() ->
erlang:error(nif_not_loaded).
The problem is that although erlang:error/1 will normally never be
called, Dialyzer will think that any call to the function will fail
and thus generate false warnings. Adding a spec for the function
will not help because Dialyzer will not believe the spec.
Add erlang:nif_error/1,2 that work exactly like erlang:error/1,2.
Define the return types for both BIFs to be t_any().
erlang:nif_error is used like this:
-spec foo() -> binary().
foo() ->
erlang:nif_error(nif_not_loaded).
(The -spec is optional but highly recommended, since Dialyzer
otherwise has no chance to figure out the types.)
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Add new NIF API functions
- enif_make_atom_len
- enif_make_existing_atom_len
- enif_make_string_len
These are basically the same as enif_make_atom,
enif_make_existing_atom and enif_make_string except that the
new functions require a length parameter instead of a
null-terminated C-string.
Signed-off-by: Tuncer Ayaz <[email protected]>
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Add new NIF API functions
- enif_get_atom_length
- enif_get_list_length
Signed-off-by: Tuncer Ayaz <[email protected]>
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Add new NIF API functions
- enif_is_list
- enif_is_tuple
Signed-off-by: Tuncer Ayaz <[email protected]>
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While binary_to_term/2 was added in R13B04, it wasn't auto-imported. This
conformed to longstanding policy of not changing auto-imports between major
versions. This patch contains changes to auto-import binary_to_term/2 to
coincide with the release of R14.
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Signed-off-by: Tuncer Ayaz <[email protected]>
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Correct behaviour of copy/2 witn 0 copies.
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Reported by Uwe Dauernheim.
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New NIF API function enif_make_new_binary
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* ta/nif-documentation:
Fix typos in erl_nif.xml
Build erl_nif manpage
OTP-8558 ta/nif-documentation
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Fix a couple trivial typos in erl_nif.xml.
Signed-off-by: Tuncer Ayaz <[email protected]>
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Build and install erl_nif manpage.
Signed-off-by: Tuncer Ayaz <[email protected]>
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"Lose" means not "not win", but "loose" means "not tight".
Change "loose" to "lose" where appropriate.
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* pan/otp_8332_halfword:
Teach testcase in driver_suite the new prototype for driver_async
wx: Correct usage of driver callbacks from wx thread
Adopt the new (R13B04) Nif functionality to the halfword codebase
Support monitoring and demonitoring from driver threads
Fix further test-suite problems
Correct the VM to work for more test suites
Teach {wordsize,internal|external} to system_info/1
Make tracing and distribution work
Turn on instruction packing in the loader and virtual machine
Add the BeamInstr data type for loaded BEAM code
Fix the BEAM dissambler for the half-word emulator
Store pointers to heap data in 32-bit words
Add a custom mmap wrapper to force heaps into the lower address range
Fit all heap data into the 32-bit address range
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* hawk/escript-add-create-and-extract:
Add type info for record fields
Remove the undocumented function escript:foldl/3
Make reltool independent of the function escript:foldl/3
Add functions to create and extract escripts
Add function zip:foldl/3 to iterate over zip archives
OTP-8521 hawk/escript-add-create-and-extract
Added function zip:foldl/3 to iterate over zip archives.
Added functions to create and extract escripts. See escript:create/2 and
escript:extract/2.
The undocumented function escript:foldl/3 has been removed. The same
functionality can be achieved with the more flexible functions
escript:extract/2 and zip:foldl/3.
Record fields has been annotated with type info. Source files as been
adapted to fit within 80 chars and trailing whitespace hasd been removed.
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Both reltool and rebar needs to parse escripts. They are currently
using an undocumented function called escript:foldl/3. It folds a
function over all files in the body of an escript. If the body
contains source code the function compiles it and the gives debug
compiled beam code to the fold fun. If the body is an archive the fun
is applied for all files in the archive.
Instead of making the undocumented function public, the new functions
escript:create/2 and escript:extract/2 has been introduced. Together
with the new zip:foldl/3 function they have the same functionality as
escript:foldl/3 in a more flexible and generic way.
escript:foldl/3 should be removed as soon as reltool and rebar has
been adopted to use the new functions. The simplest way for reltool
and rebar to do this is to just copy the code from
escript_SUITE:escript_foldl/3, which happens to provide a future
compatible implementation of an emulated escript:foldl/3 function.
I was quite hesitant when I introduced the compile_source option. It
feels that it does not belong there but the alternative felt worse.
The rationale for the compile_source option is that it is a bit
cumbersome to compile the source code, as the source in most cases is
partial. In order to do compile the source you need to know about some
internals in escript. Without compile_source I think that these
internals should be documented. Further you need to duplicate parts of
the code.
Without the compile_source option you need to first parse the source
to forms, using an undocumented function in epp with an extended
format of predefined macros which also is undocumented. Then you need
to investigate the forms to see if you need to add an export form for
main. When that is done you can run the rest of the compiler passes as
usual. It is not so much code (60 lines or so) to write, but I do not
want to urge people to write it. I actually wrote the code (see
escript_SUITE:escript_foldl/3) before I decided to introduce the
compile_source option.
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The documentation (*.xml) in the otp tree has a common grammatical
problem, "it's" and "its" are often interchanged. That is annoying
for some readers.
This commit consists entirely of "it's" -> "its" changes. I went
through every .xml file in the tree. If there are any remaining
bugs of this type, it's because I missed them, not because I
didn't look.
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Some test suites need to differentiate between 32-bit terms
and 32-bit pointers.
While at it, remove some more warnings in process.c for SMP and debug.
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Driver API for multi-threading made available for NIFs.
Support for mempory managed (garbage collected) resource objects.
A way to pass "pointers" to native data structures between C and
Erlang in a safe way.
Support for references, floats and term comparison.
Various new functions, like enif_inspect_iolist_as_binary,
enif_make_sub_binary, enif_get_string, enif_get_atom,
enif_make_tuple_from_array, enif_make_list_from_array,
enif_make_existing_atom.
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Driver API for multi-threading made available for NIFs.
Support for mempory managed (garbage collected) resource objects.
A way to pass "pointers" to native data structures between C and
Erlang in a safe way.
Support for references, floats and term comparison.
Various new functions, like enif_inspect_iolist_as_binary,
enif_make_sub_binary, enif_get_string, enif_get_atom,
enif_make_tuple_from_array, enif_make_list_from_array,
enif_make_existing_atom.
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