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* maint:
Introduce time management in native APIs
Introduce time warp safe replacement for safe_fixed option
Introduce time warp safe trace timestamp formats
Conflicts:
erts/emulator/beam/erl_bif_trace.c
erts/emulator/beam/erl_driver.h
erts/emulator/beam/erl_nif.h
erts/emulator/beam/erl_trace.c
erts/preloaded/ebin/erlang.beam
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The Dets server pretends the file is open before internal_open()
has been called, which means that unless the internal_open
message is applied first, other processes can find the pid by
calling dets_server:get_pid() and do things before Head has been
initialized properly.
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The new time warp safe option is safe_fixed_monotonic_time which
gives erlang:monotonic_time().
The safe_fixed option was also slightly changed. It now gives
erlang:timestamp() instead of erlang:now(). This has however
not been documented, so it is considered a compatible change.
The above effects both ets, and dets.
This commit also include the bugfix OTP-13239 for
dets:info(Tab, safe_fixed). The timestamp in the result returned
by dets:info(Tab, safe_fixed) was unintentionally broken as a
result of the time API rewrites in OTP 18.0.
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See also ERL-55.
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The correction is due to the the evil testcase
dets_SUITE:simultaneous_open(). If the process repairing a Dets file
is killed (should normally never happen), and another process tries to
repair the file, a temporary file from the first process could live on
for a while, even after a successful call to file:delete(). This has
only been seen on W-nd-ows, where it is a known problem.
There are other ways to deal with the problem (rename the file; use
some other filename), but we continue using one certain filename in
order to be as backwards compatible as possible.
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Thanks to Alexei Sholik for reporting the bug.
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Instead of deleting the small file when opening it with
dets:open_file/2 an error message is returned, mimicking the behaviour
when the file is bigger.
open_file/1 has been modified to return the same error message when
the file is small as when the file is bigger.
Thanks to Hakan Mattson for reporting this bug.
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Thanks to Hakan Mattson for reporting this bug.
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* maint:
Fix a Dets bug concerning traversal of tables
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The bug was introduced in R16B.
Thanks to Manuel Durán Aguete.
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The test case deletes a Dets process while it is repairing a file.
Another client waiting for the Dets process to reply then kicks in and
repairs the file. Apparently the temporary file was still open,
resulting in an eacces error on Windows.
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Opaque types need to be exported.
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Dets tables are no longer fixed while traversing with a bound key
(when only the objects with the right key are matched). This
optimization affects the functions match/2, match_object/2, select/2,
match_delete/2, and select_delete/2.
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A Dets table with sufficiently large buckets could not always be repaired.
(Reported by Gordon Guthrie.)
The format of Dets files has been modified. When downgrading tables
created with the new system will be repaired. Otherwise the
modification should not be noticeable.
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If a Dets table had been properly closed but the space management data
could not been read, it was not possible to repair the file.
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Running Dialyzer on the test suites revealed a few type errors.
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* hb/stdlib/dets_tablenames/OTP-9282:
Allow Dets tablenames to be arbitrary terms
Conflicts:
lib/stdlib/src/dets.erl
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* hb/stdlib/dets_chunk_match/OTP-8903:
Fix a bug concerning bchunk(), match() and select()
Conflicts:
lib/stdlib/test/dets_SUITE.erl
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If a Dets table was closed after calling bchunk/2, match/1,3,
match_object/1,3, or select/1,3 and then opened again, a subsequent
call using the returned continuation would normally return a reply.
This bug has fixed; now the call fails with reason 'badarg'.
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* hb/stdlib/dets_stream_op/OTP-8899:
Fix a bug that could cause 'bad_object' errors
Conflicts:
lib/stdlib/test/dets_SUITE.erl
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When several clients accessed a Dets table simultaneously,
modifications of the Dets server's internal state were sometimes
thrown away. The symptoms are diverse: error with reason 'bad_object';
inserted objects not returned by lookup(); et cetera.
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When several clients accessed a Dets table simultaneously, inserted or
updated objects were sometimes lost due to the Dets file being
truncated.
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* ks/dialyzer:
dialyzer: Build the PLT even if there are unresolved remote types
proplists: Export the type property()
erl_lint: Issue warnings for undefined exported types
Minor fix in a print message
Add handling of unknown types
Add declaration for exported types
Add types and specs; performed some cleanups also
erl_scan: Add declarations for exported types
stdlib: Add declarations for exported types
hipe: Add declarations for exported types
compiler: Add declarations for exported types
syntax_tools: Add declarations for exported types
kernel: Add declaration for exported types
Support -export_type() in dialyzer and erl_types
Add infrastructure for the -export_type() attribute
OTP-8678 ks/dialyzer
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