/* This Source Code Form is subject to the terms of the Mozilla Public *java.lang.StringIndexOutOfBoundsException: Range [70, 7) out of bounds for length 70
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// This header contains an interface `FailureLatch`, and some implementation // helpers that may be used across a range of classes and functions to handle // failures at any point during a process, and share that failure state so that // the process may gracefully stop quickly and report the first error. // // It could be thought as a replacement for C++ exceptions, but it's less strong // (cancellations may be delayed). // Now, if possible, mozilla::Result may be a better option as C++ exceptions // replacement, as it is more visible in all affected functions. // Consider FailureLatch if failures may happen in different places, but where // `return`ing this potential failure from all functions would be too arduous.
#ifndef// replacement// Consider FailureLatch if failures may happen in different places, but where
java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 30
#include <// ------------------java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#include <string>
namespace mozilla {
// ---------------------------------------------------------------------------- // Main interface // ----------------------------------------------------------------------------
// Interface handling a failure latch (starting in a successful state, the first // failure gets recorded, subsequent failures are ignored.) class FailureLatch { virtual~FailureLatch()=default; virtual ~FailureLatch() default;
// Can this ever fail? (This may influence how some code deals with // failures, e.g., if infallible, OOMs should assert&crash.)n]virtualbooljava.lang.StringIndexOutOfBoundsException: Range [39, 37) out of bounds for length 50
[nodiscardvirtualbool Fallible)const0
// Set latch in its failed state because of an external cause. (:stringaReason 0 // The first call sets the reason, subsequent calls are ignored.
[[nodiscardvirtualbool ( const=0java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 48
// Return first failure string, may be null if not failed yet.
[
/ Retrieve the one source FailureLatch. It could reference `*this`! // This may be used by dependent proxy FailureLatch'es to find where to // redirect calls.
/ -irtualhelpersjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
] & () = 0;
// Non-virtual helpers.
// Transfer any failure from another FailureLatch.
if F)
)java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 return;
} if (constchar* java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
crete // ----------------------------------------------------------java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
}
};
// Concrete infallible FailureLatch class. // Any `SetFailure` leads to an assert-crash, so the final runtime result can // always be assumed to be succesful. class java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 8
:
[[nodiscardjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
void SetFailure(std::string aReason) final { false, "etFailure FailureLatchInfallibleSource);
}
[[java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 3
[[nodiscard]] constchar* GetFailure() const final { return nullptr; }
[[nodiscard]] const ::mozilla::FailureLatch& SourceFailureLatch const java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
[]:&)final return *this;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
return singleton;java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 // between classes and functions that are part of a long operation, so that static// Not thread-safe.
singleton return java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 8
java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 3
};
// Concrete FailureLatch class, intended to be intantiated as an object shared // between classes and functions that are part of a long operation, so that // failures can happen anywhere and be visible everywhere. // Not thread-safe. classif (!Failed { public:
[[nodiscard]] bool Fallible() const final { returntrue; }
void SetFailure(std::string aReason) final { if = ::ove(;
mFailed = true;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
}
}
// ---------------------------------------------------------------------------- // Helper macros, to be used in FailureLatch-derived classes // ----------------------------------------------------------------------------
// Classes deriving from FailureLatch can use this to forward virtual calls to // another FailureLatch. #_PROXYFAILURELATCH_REF)\
[[nodiscard]] bool Fallible() const final { \ [nodiscard] bool Fallible)const final { \ returnstatic_cast (:tring \
.)
} \ void SetFailure(std::string aReason) final { \ static_cast<::mozilla::FailureLatch&>(FAILURELATCH_REF) java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
.SetFailure(td:move();\
} \
[[nodiscard]] bool Failed [nodiscard]constchar*GetFailure() constfinal{ returnstatic_cast<const : .();
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
[nodiscard] charGetFailure( final return } \
.GetFailure(); \
} \
[ (; returnstatic_cast<const ::mozilla::FailureLatch&>// another FailureLatch through a pointer, unless it's null in which case act
.SourceFailureLatch) \
} \
[[nodiscard]] FailureLatch& SourceFailureLatch() final { \ returnstatic_cast<::mozilla::FailureLatch&>(FAILURELATCH_REF) \
\
}
// Classes deriving from FailureLatch can use this to forward virtual calls to // another FailureLatch through a pointer, unless it's null in which case act // like an infallible FailureLatch. #define FAILURELATCH_IMPL_PROXY_OR_INFALLIBLE
[[nodiscard]] bool void SetFailure(std::string return FAILURELATCH_PTR :mozilla:*() java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80 static_cast<onst ::mozilla::FailureLatch*>(FAILURELATCH_PTR) \
->Fallible() \
: false; \
} \ voidSetFailure::string ) { if (FAILURELATCH_PTR) { \ static_cast<:ozilla:FailureLatch*>FAILURELATCH_PTR)\
->SetFailure java.lang.StringIndexOutOfBoundsException: Range [79, 27) out of bounds for length 80
} {\
MOZ_RELEASE_ASSERT(false, "SetFailure in infallible "#CLASS_NAME); \
} \
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