Class: PDF::Reader::SynchronizedCache

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/reader/synchronized_cache.rb

Overview

Throughout the pdf-reader codebase, repeated calculations which can benefit from caching are made In some cases, caching and reusing results can not only save CPU cycles but also greatly reduce memory requirements But at the same time, we don't want to throw away thread safety We have two interchangeable thread-safe cache implementations:

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SynchronizedCache

Returns a new instance of SynchronizedCache.

Signature:

  • () -> void



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# File 'lib/pdf/reader/synchronized_cache.rb', line 24

def initialize
  @cache = {} #: Hash[Object, untyped]
  @mutex = Mutex.new #: Mutex
end

Instance Method Details

#[](key) ⇒ Object

Signature:

  • (Object) -> untyped



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# File 'lib/pdf/reader/synchronized_cache.rb', line 29

def [](key)
  @mutex.synchronize { @cache[key] }
end

#[]=(key, value) ⇒ Object

Signature:

  • (Object, (Object | nil)) -> untyped



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# File 'lib/pdf/reader/synchronized_cache.rb', line 33

def []=(key,value)
  @mutex.synchronize { @cache[key] = value }
end