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note description: "[ Garbage collector statistics. This class may be used as ancestor by classes needing its facilities. Time accounting is relevant only if enable_time_accounting (from MEMORY) has been called. ]" library: "Free implementation of ELKS library" status: "See notice at end of class." legal: "See notice at end of class." date: "$Date: 2017-12-26 09:35:31 -0900 (Tue, 26 Dec 2017) $" revision: "$Revision: 101217 $" class interface GC_INFO create make (memory: INTEGER_32) -- Fill in statistics for memory type require memory_valid: memory = Incremental_collector or memory = Full_collector ensure type_set: type = memory feature -- Initialization make (memory: INTEGER_32) -- Fill in statistics for memory type require memory_valid: memory = Incremental_collector or memory = Full_collector ensure type_set: type = memory structure_make -- Initialize current with given structure_size. -- (from MEMORY_STRUCTURE) ensure -- from MEMORY_STRUCTURE not_shared: not shared make_by_pointer (a_ptr: POINTER) -- Initialize current with a_ptr. -- (from MEMORY_STRUCTURE) require -- from MEMORY_STRUCTURE a_ptr_not_null: a_ptr /= default_pointer ensure -- from MEMORY_STRUCTURE shared: shared update (memory: INTEGER_32) -- Fill in statistics for memory type require memory_valid: memory = Incremental_collector or memory = Full_collector ensure type_set: type = memory feature -- Access C_memory: INTEGER_32 = 2 -- Code for the C memory managed -- by the garbage collector -- (from MEM_CONST) collected: INTEGER_32 -- Number of bytes collected by the last cycle, -- for type before last call to update collected_average: INTEGER_32 -- Average number of bytes collected by a cycle, -- for type before last call to update cpu_interval_time: REAL_64 -- Amount of CPU time elapsed since between last -- and penultimate cycles for type before -- last call to update cpu_interval_time_average: REAL_64 -- Average amount of CPU time between two cycles, -- for type before last call to update cpu_time: REAL_64 -- Amount of CPU time, in seconds, spent in cycle, -- for type before last call to update cpu_time_average: REAL_64 -- Average amount of CPU time spent in cycle, -- in seconds, for type before last call to update cpu_total_time: REAL_64 -- Amount of application CPU time, in seconds, for type before last call to update cycle_count: INTEGER_32 -- Number of collection cycles for type -- before last call to update Eiffel_memory: INTEGER_32 = 1 -- Code for the Eiffel memory managed -- by the garbage collector -- (from MEM_CONST) Full_collector: INTEGER_32 = 0 -- Statistics for full collections -- (from MEM_CONST) generating_type: TYPE [detachable GC_INFO] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty Incremental_collector: INTEGER_32 = 1 -- Statistics for incremental collections -- (from MEM_CONST) item: POINTER -- Access to memory area. -- (from MEMORY_STRUCTURE) memory_used: INTEGER_32 -- Total number of bytes used (counting overhead) -- after last cycle for type before last -- call to update real_interval_time: INTEGER_32 -- Real interval time (as opposed to CPU time) between -- two automatically raised cycles, in centi-seconds, -- for type before last call to update real_interval_time_average: INTEGER_32 -- Average real interval time between two automatic -- cycles, in centi-seconds, -- for type before last call to update real_time: INTEGER_32 -- Real time in centi-seconds used by last cycle -- for type, before last call to update; -- this may not be accurate on systems which do not -- provide a sub-second accuracy clock (typically -- provided on BSD). real_time_average: INTEGER_32 -- Average amount of real time, in centi-seconds, -- spent in collection cycle, -- for type before last call to update shared: BOOLEAN -- Is current memory area shared with others? -- (from MEMORY_STRUCTURE) sys_interval_time: REAL_64 -- Amount of kernel time elapsed since between -- the last and the penultimate cycle, -- for type before last call to update sys_interval_time_average: REAL_64 -- Average amount of kernel time between two cycles, -- for type before last call to update sys_time: REAL_64 -- Amount of kernel time, in seconds, spent in cycle, -- for type before last call to update sys_time_average: REAL_64 -- Average amount of kernel time spent in cycle, -- for type before last call to update sys_total_time: REAL_64 -- Amount of application kernel time, in seconds, for type before last call to update Total_memory: INTEGER_32 = 0 -- Code for all the memory managed -- by the garbage collector -- (from MEM_CONST) type: INTEGER_32 -- Collector type (Full, Collect), -- for type before last call to update feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal (other: GC_INFO): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: GC_INFO): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal (other: GC_INFO): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void exists: BOOLEAN -- Is allocated memory still allocated? -- (from MEMORY_STRUCTURE) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) feature -- Duplication copy (other: GC_INFO) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: GC_INFO) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: GC_INFO -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: GC_INFO) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: GC_INFO -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: GC_INFO -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable GC_INFO -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class feature -- Implementation structure_size: INTEGER_32 -- Size of underlying C structure. ensure -- from MEMORY_STRUCTURE is_class: class positive_result: Result > 0 feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void invariant -- from MEMORY_STRUCTURE managed_pointer_valid: not shared implies managed_pointer /= Void internal_item_valid: shared implies internal_item /= default_pointer -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2017, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class GC_INFO
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