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# 3a50a9fe 11-Jan-2019 George Karpenkov <[email protected]>

[attributes] Extend os_returns_(not_?)_retained attributes to parameters

When applied to out-parameters, the attributes specify the expected lifetime of the written-into object.

Additionally, intro

[attributes] Extend os_returns_(not_?)_retained attributes to parameters

When applied to out-parameters, the attributes specify the expected lifetime of the written-into object.

Additionally, introduce OSReturnsRetainedOn(Non)Zero attributes, which
specify that an ownership transfer happens depending on a return code.

Differential Revision: https://reviews.llvm.org/D56292

llvm-svn: 350942

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Revision tags: llvmorg-7.0.1, llvmorg-7.0.1-rc3
# da2c77f9 06-Dec-2018 George Karpenkov <[email protected]>

[attributes] Add an attribute os_consumes_this, with similar semantics to ns_consumes_self

The attribute specifies that the call of the C++ method consumes a
reference to "this".

Differential Revis

[attributes] Add an attribute os_consumes_this, with similar semantics to ns_consumes_self

The attribute specifies that the call of the C++ method consumes a
reference to "this".

Differential Revision: https://reviews.llvm.org/D55155

llvm-svn: 348532

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# 1657f36c 30-Nov-2018 George Karpenkov <[email protected]>

[attributes] Add a family of OS_CONSUMED, OS_RETURNS and OS_RETURNS_RETAINED attributes

The addition adds three attributes for communicating ownership,
analogous to existing NS_ and CF_ attributes.

[attributes] Add a family of OS_CONSUMED, OS_RETURNS and OS_RETURNS_RETAINED attributes

The addition adds three attributes for communicating ownership,
analogous to existing NS_ and CF_ attributes.
The attributes are meant to be used for communicating ownership of all
objects in XNU (Darwin kernel) and all of the kernel modules.
The ownership model there is very similar, but still different from the
Foundation model, so we think that introducing a new family of
attributes is appropriate.

The addition required a sizeable refactoring of the existing code for
CF_ and NS_ ownership attributes, due to tight coupling and the fact
that differentiating between the types was previously done using a
boolean.

Differential Revision: https://reviews.llvm.org/D54912

llvm-svn: 347947

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