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Change-Id: Ifc81564daf3fef0d7f08ae8d250ba41d3b1d5b0f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
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This follows QArrayData::detachFlags's lead. Given the (known) size for
a detached container, the function helps determine capacity, ensuring
the capacityReserved flag is respected.
This further helps aggregating behaviour on detach in QArrayData itself.
SimpleVector was previously using qMax(capacity(), newSize), but there's
no reason to pin the previous capacity value if reserve() wasn't
requested. It now uses detachCapacity().
Change-Id: Ide2d99ea7ecd2cd98ae4c1aa397b4475d09c8485
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This is expected by QByteArray and QString
Change-Id: Ib668b144bdc0d2c793018c8f8d794f249eaf935c
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
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Change-Id: I6f41ca054d0e0a0c4642f0b841b3b3df9559f818
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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This is meant to reduce the number of allocations on growing containers.
It serves the same purpose as the existing qAllocMore which is currently
used by container classes.
While only a container knows when it is growing, it doesn't need to care
how that information is used. qAllocMore is currently treated as a
black-box and its result is (basically) forwarded blindly to an allocate
function. In that respect, container code using qAllocMore acts as an
intermediary.
By merging that functionality in the allocate function itself we offer
the same benefits without the intermediaries, allowing for simpler code
and centralized decisions on memory allocation.
Once all users of qAllocMore get ported to QArrayData and
QArrayData::allocate, qAllocMore can be moved or more closely integrated
into qarraydata.cpp and qtools_p.h can be dropped.
Change-Id: I4c09bf7df274b45c399082fc7113a18e4641c5f0
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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The macro was made empty in 4ecf82795de54fba530ac9c386f3afff2174edbd,
and is no longer necessary or used.
Change-Id: If000ff51729e41bdcd1b0409961cf94d50e5f172
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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- Updated copyright year, per 1fdfc2abfe1fa26b86028934d4853432e25b4655
- Updated contact information, 629d6eda5cf67122776981de9073857bbc3dcba2
- Drop "All rights reserved", 5635823e17db3395d9b0fa8cfcc72f82fea583f4
(Empty line added to maintain license header line count)
Change-Id: Ie401e2b6e40a4b79f4191377dd50dc60be801e1f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This provides the same functionality as the specialized QStringLiteral
and QByteArrayLiteral, but on top of QArrayData.
The macro has two variations, variadic and simple. The variadic version
depends on compiler support for (C99) variadic macros and enables
static initialization of arrays of any POD data. Use of this macro is
not recommended on code or applications that need to work in
configurations where variadic macros are not supported.
The simple version is more portable and is enough to support the use
cases of QStringLiteral and QByteArrayLiteral, also providing a fallback
that allocates and copies data when static initialization is not
available.
Change-Id: I7154a24dcae4bbbd7d5978653f620138467830c5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This is done through a (POD) wrapper around a raw QTypedArrayData
pointer. The wrapper forces conscious decisions on the use of that
pointer, while implying it is internal API.
The pointed-to header is assumed to referenced, as if already owned by
the receiving QArrayDataPointer.
This wrapper is placed in the generic qarraydata.h header as its
definition doesn't depend on QArrayDataPointer by itself.
Change-Id: I9b2b6bb7dd9ab073dc7d882ccf999b32d793ed3f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Change-Id: Id3e7c748b4b40d703ad1785c903c96bdd968390e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
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By default, QTypedArrayData::fromRawData provides the same semantics as
already exist in QByteArray and QString (immutable, sharable data), but
more combinations are possible. In particular, immutable-unsharable
leaves the data owner in control of its lifetime by forcing deep copies.
As part of this, a new isMutable property is introduced in QArrayData.
This could be taken to be implicit in statics that are initialized with
a proper size but with alloc set to 0. QStringLiteral and QByteLiteral
already did this, forcing re-allocations on resize even before the
(static, thus shared) ref-count is considered.
The isMutable property detaches data mutability and shared status, which
are orthogonal concepts (at least in the unshared state). For the time
being, there is no API to explicitly (re)set mutability, but statics and
RawData mark data immutable.
Change-Id: I33a995a35e1c3d7a12391b1d7c36095aa28e221a
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This approach is better for future ABI evolution than using individual
bool parameters. QArrayData now also offers to calculate allocate
options for typical detach and clone operations: the CapacityReserved
flag is preserved, while cloning resets the Unsharable state.
Change-Id: I256e135adcf27a52a5c7d6130069c35c8b946bc3
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
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They still exist and help avoid allocation of "empty" array headers, but
they're no longer part of the public API, thus reducing relocatable
symbols and relocations in inline code.
This means an extra non-inline call on QArrayDataPointer::clear and
setSharable operations, which are (expensive) detaching operations,
anyway.
Change-Id: Iea804e5ddc8af55ebc0951ca17a7a4e8401abc55
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Making use of the same feature added in RefCount.
To keep with the intention of avoiding the allocation of "empty" array
headers, this introduces an unsharable_empty, which allows users to
maintain the "unsharable bit" on empty containers, without imposing any
actual allocations.
(Before anyone asks, there is no point to a zero-sized capacity-reserved
container so no other combinations are needed for now.)
Change-Id: Icaa40ac3100ad954fdc20dee0c991861136a5b19
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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This was only being used to initialize static read-only RefCount
instances, where the value is hard-wired to -1. Instead of allowing
initialization with arbitrary values (which for a reference count can be
error prone) the intent of the macro is made explicit with its
replacement Q_REFCOUNT_INITIALIZE_STATIC.
Change-Id: I5b0f3f1eb58c3d010e49e9259ff4d06cbab2fd35
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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QTypedArrayData is a typed overlay for QArrayData, providing convenience
and type-safety. It adds no data members to QArrayData, thus avoiding
compiler-generated warnings for aliasing issues when casting back and
forth.
Change-Id: I969342a30989c4c14b3d03d0602e3d60a4cc0e9d
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
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Centralizing QArrayData memory management decisions in one place will
allow us to be smarter in how we allocate header and data.
At the moment, these are allocated as a single block. In the future we
may decide to allocate them separately for "large" data or specific
alignment requirements.
For users of QArrayData this remains transparent and not part of the
ABI. The offset field in QArrayDataHeader enables this.
This also hard-wires allocation of empty arrays to return shared_empty.
Allocating detached headers (e.g., to support fromRawData) will thus
require explicit support.
Change-Id: Icac5a1f51ee7e468c76b4493d29debc18780e5dc
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
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Modeled on QByteArrayData/QStringData/QVectorData, the intent is to
unify book-keeping structs for array-like data and enable sharing of
code among them.
As in those structures, size (and alloc) data member(s) specify the
number of *typed* elements the array does (and can) hold. The size or
alignment requirements of those objects is not tracked in this data
structure and needs to be maintained by its users.
Contrary to QByteArrayData and QStringData, QArrayData's offset member
keeps a *byte* offset to the actual data array and is computed from the
beginning of the struct.
Shared-null and -empty functionality is provided by QArrayData and
shared among all users.
Planned features include setSharable (force deep copies), fromRawData
(detached header and data allocations) and literals a la QStringLiteral
(static immutable instances), thus covering the functionality needed for
QByteArray, QString and QVector.
Change-Id: I9aa709dbb675442e6d06965efb8138ab84602bbd
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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