class Prawn::SynchronizedCache

Throughout the Prawn codebase, repeated calculations which can benefit from caching are made. n 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. @private

Public Class Methods

new ()

Source

# File lib/prawn/utilities.rb, line 12
def initialize
  @cache = {}
  @mutex = Mutex.new
end

As an optimization, this could access the hash directly on VMs with a global interpreter lock (like MRI).

Public Instance Methods

[] (key)

Source

# File lib/prawn/utilities.rb, line 21
def [](key)
  @mutex.synchronize { @cache[key] }
end

Get cache entry.

@param key [any] @return [any]

[]= (key, value)

Source

# File lib/prawn/utilities.rb, line 30
def []=(key, value)
  @mutex.synchronize { @cache[key] = value }
end

Set cache entry.

@param key [any] @param value [any] @return [void]