Now that the requirements and implementation of asynchronous I/O are
better understood, adjust their I/O runtime APIs. In particular:
1) Remove the BeginAsynchronousOutput/Input APIs; they're not needed,
since any data transfer statement might have ASYNCHRONOUS= and
(if ASYNCHRONOUS='YES') ID= control list specifiers that need to
at least be checked.
2) Add implementations for BeginWait(All) to check for the error
case of a bad unit number and nonzero ID=.
3) Rearrange and comment SetAsynchronous so that it's clear that
it can be called for READ/WRITE as well as for OPEN.
The implementation remains completely synchronous, but should be conforming.
Where opportunities make sense for true asynchronous implementations of
some big block transfers without SIZE= in the future, we'll need to add
a GetAsynchronousId API to capture ID= on a READ or WRITE; add sourceFile
and sourceLine arguments to BeginWait(All) for good error reporting;
track pending operations in unit.h; and add code to force synchronization
to non-asynchronous I/O operations.
Lowering should call SetAsynchronous when ASYNCHRONOUS= appears as
a control list specifier. It should also set ID=x variables to 0
until such time as we support asynchronous operations, if ever.
This patch only removes the removed APIs from lowering.
Differential Revision: https://reviews.llvm.org/D126143
Some refactoring and related fixes for more accurate
user program error recovery in the I/O runtime, especially
for error recovery with IOMSG= character values.
1) Move any work in an EndIoStatement() implementation
that may raise an error into a new CompleteOperation()
member function. This allows error handling APIs like
GetIoMsg() to complete a pending I/O statement and harvest
any errors that may result.
2) Move the pending error code from ErroneousIoStatementState
to a new pendingError_ data member in IoErrorHandler.
This allows IoErrorHandler::InError() to return a correct
result when there is a pending error that will be recovered
from so that I/O list data transfers don't crash in the meantime.
3) Don't create and leak a unit for a failed OPEN(NEWUNIT=n)
with error recovery, and don't modify 'n'. (Depends on
changes to API call ordering in lowering, in a separate patch;
code was added to ensure that OPEN statement control list
specifiers, e.g. SetFile(), must be passed before GetNewUnit().)
4) Fix the code that calls a form of strerror to fill an
IOMSG= variable so that it actually works for Fortran's
character type: blank fill with no null or newline termination.
Differential Revision: https://reviews.llvm.org/D122036
Move the closure of the subset of flang/runtime/*.h header files that
are referenced by source files outside flang/runtime (apart from unit tests)
into a new directory (flang/include/flang/Runtime) so that relative
include paths into ../runtime need not be used.
flang/runtime/pgmath.h.inc is moved to flang/include/flang/Evaluate;
it's not used by the runtime.
Differential Revision: https://reviews.llvm.org/D109107
With derived type description tables now available to the
runtime library, it is possible to implement the concept
of "child" I/O statements in the runtime and use them to
convert instances of derived type I/O data transfers into
calls to user-defined subroutines when they have been specified
for a type. (See Fortran 2018, subclauses 12.6.4.8 & 13.7.6).
- Support formatted, list-directed, and NAMELIST
transfers to internal parent units; support these, and unformatted
transfers, for external parent units.
- Support nested child defined derived type I/O.
- Parse DT'foo'(v-list) FORMAT data edit descriptors and passes
their strings &/or v-list values as arguments to the defined
formatted I/O routines.
- Fix problems with this feature encountered in semantics and
FORMAT valiation during development and end-to-end testing.
- Convert typeInfo::SpecialBinding from a struct to a class
after adding a member function.
Differential Revision: https://reviews.llvm.org/D104930
Debug the input path for READ statements with END= labels;
don't emit errors when the program can handle them.
BeginReadingRecord() member functions have been made
"bool" for more convenient handling of error cases,
and some code in IoErrorHandler has been cleaned up.
Differential Revision: https://reviews.llvm.org/D100421
Scan FORMAT strings locally to avoid C++ binary runtime dependence when computing deepest parenthesis nesting
Remove a dependency on ostream from runtime
Remove remaining direct external references from runtime to C++ library binaries
Remove runtime dependences on lib/common
SetPos() and SetRec()
Instantiate templates for input
Begin input; rearrange locking, deal with CLOSE races
View()
Update error message in test to agree with compiler change
First cut at real input
More robust I/O runtime error handling
Debugging of REAL input
Add iostat.{h,cpp}
Rename runtime/numeric-* to runtime/edit-*
Move templates around, templatize integer output editing
Move LOGICAL and CHARACTER output from io-api.cpp to edit-output.cpp
Change pointer argument to reference
More list-directed input
Complex list-directed input
Use enum class Direction rather than bool for templates
Catch up with changes to master
Undo reformatting of Lower code
Use record number instead of subscripts for internal unit
Unformatted sequential backspace
Testing and debugging
Dodge bogus GCC warning
Add <cstddef> for std::size_t to fix CI build
Address review comments
Original-commit: flang-compiler/f18@50406b3496
Reviewed-on: https://github.com/flang-compiler/f18/pull/1053
Use internal units for internal I/O state
Replace use of virtual functions
reference_wrapper
Internal formatted output to array descriptor
Delete dead code
Begin list-directed internal output
Refactorings and renamings for clarity
List-directed external I/O (character)
COMPLEX list-directed output
Control list items
First cut at unformatted I/O
More OPEN statement work; rename class to ExternalFileUnit
Complete OPEN (exc. for POSITION=), add CLOSE()
OPEN(POSITION=)
Flush buffers on crash and for terminal output; clean up
Documentation
Fix backquote in documentation
Fix typo in comment
Begin implementation of input
Refactor binary floating-point properties to a new header, simplify numeric output editing
Dodge spurious GCC 7.2 build warning
Address review comments
Original-commit: flang-compiler/f18@9c4bba11cf
Reviewed-on: https://github.com/flang-compiler/f18/pull/982
internal formatted WRITE with no data list items.
Improve argument names in io-api.h
Bump up error number to not conflict with errno values
Use Fortran::runtime::io namespace
Add wrapper around malloc/free, allow use of unique_ptr with wrapper
IoErrorHandler
Revamp FormatContext, use virtual member functions
Update comment syntax, allow for old C
12HHELLO, WORLD
Remove files not yet ready for review
Use std::forward
Fix gcc build warnings
Fix redundant filename in license boilerplate
Reduce runtime dependence on compiler binary libraries, fixing shared lib builds
Original-commit: flang-compiler/f18@839a91f1d6
Reviewed-on: https://github.com/flang-compiler/f18/pull/946
Peter Klausler