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-rw-r--r--lib/pstore.rb142
1 files changed, 0 insertions, 142 deletions
diff --git a/lib/pstore.rb b/lib/pstore.rb
deleted file mode 100644
index 409fc6dfc0..0000000000
--- a/lib/pstore.rb
+++ /dev/null
@@ -1,142 +0,0 @@
-#
-# How to use:
-#
-# db = PStore.new("/tmp/foo")
-# db.transaction do
-# p db.roots
-# ary = db["root"] = [1,2,3,4]
-# ary[0] = [1,1.5]
-# end
-
-# db.transaction do
-# p db["root"]
-# end
-
-require "marshal"
-require "ftools"
-
-class PStore
- class Error < StandardError
- end
-
- def initialize(file)
- dir = File::dirname(file)
- unless File::directory? dir
- raise PStore::Error, format("directory %s does not exist", dir)
- end
- unless File::writable? dir
- raise PStore::Error, format("directory %s not writable", dir)
- end
- if File::exist? file and not File::readable? file
- raise PStore::Error, format("file %s not readable", file)
- end
- @transaction = false
- @filename = file
- @abort = false
- end
-
- def in_transaction
- raise PStore::Error, "not in transaction" unless @transaction
- end
- private :in_transaction
-
- def [](name)
- in_transaction
- value = @table[name]
- if value == nil
- raise PStore::Error, format("undefined root name `%s'", name)
- end
- value
- end
- def []=(name, value)
- in_transaction
- @table[name] = value
- end
- def delete(name)
- in_transaction
- @table.delete name
- end
-
- def roots
- in_transaction
- @table.keys
- end
- def root?(name)
- in_transaction
- @table.key? name
- end
- def path
- @filename
- end
-
- def commit
- @abort = false
- throw :pstore_abort_transaction
- end
- def abort
- @abort = true
- throw :pstore_abort_transaction
- end
-
- def transaction
- raise PStore::Error, "nested transaction" if @transaction
- begin
- @transaction = true
- value = nil
- backup = @filename+"~"
- if File::exist?(@filename)
- file = File::open(@filename, "r+")
- orig = true
- else
- @table = {}
- file = File::open(@filename, "w+")
- Marshal::dump(@table, file)
- end
- file.flock(File::LOCK_EX)
- if orig
- File::copy @filename, backup
- @table = Marshal::load(file)
- end
- begin
- catch(:pstore_abort_transaction) do
- value = yield(self)
- end
- rescue Exception
- @abort = true
- raise
- ensure
- unless @abort
- begin
- file.rewind
- Marshal::dump(@table, file)
- rescue
- File::rename backup, @filename if File::exist?(backup)
- raise
- end
- end
- @abort = false
- end
- ensure
- @table = nil
- @transaction = false
- file.close
- end
- value
- end
-end
-
-if __FILE__ == $0
- db = PStore.new("/tmp/foo")
- db.transaction do
- p db.roots
- ary = db["root"] = [1,2,3,4]
- ary[1] = [1,1.5]
- end
-
- 1000.times do
- db.transaction do
- db["root"][0] += 1
- p db["root"][0]
- end
- end
-end