foedus::snapshot::ReducerBufferStatus Union Reference

Compactly represents important status informations of a reducer buffer. More...

Detailed Description

Compactly represents important status informations of a reducer buffer.

Concurrent threads use atomic CAS to change any of these information. Last 32 bits are tail position of the buffer in bytes divided by 8, so at most 32 GB buffer.

Definition at line 69 of file log_reducer_impl.hpp.

#include <log_reducer_impl.hpp>

Collaboration diagram for foedus::snapshot::ReducerBufferStatus:

Classes
struct	Components

Public Member Functions
bool	is_no_more_writers () const
bool	is_clear () const
uint16_t	get_active_writers () const
BufferPosition	get_tail_position () const
uint64_t	get_tail_bytes () const

Public Attributes
uint64_t	word
struct foedus::snapshot::ReducerBufferStatus::Components	components

Member Function Documentation

uint16_t foedus::snapshot::ReducerBufferStatus::get_active_writers ( ) const

inline

Definition at line 81 of file log_reducer_impl.hpp.

References foedus::snapshot::ReducerBufferStatus::Components::active_writers_, and components.

{ return components.active_writers_; }

uint64_t foedus::snapshot::ReducerBufferStatus::get_tail_bytes ( ) const

inline

Definition at line 83 of file log_reducer_impl.hpp.

References components, foedus::snapshot::from_buffer_position(), and foedus::snapshot::ReducerBufferStatus::Components::tail_position_.

{ return from_buffer_position(components.tail_position_); }

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BufferPosition foedus::snapshot::ReducerBufferStatus::get_tail_position ( ) const

inline

Definition at line 82 of file log_reducer_impl.hpp.

References components, and foedus::snapshot::ReducerBufferStatus::Components::tail_position_.

{ return components.tail_position_; }

bool foedus::snapshot::ReducerBufferStatus::is_clear ( ) const

inline

Definition at line 80 of file log_reducer_impl.hpp.

Referenced by foedus::snapshot::LogReducer::handle_process().

{ return word == 0; }

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bool foedus::snapshot::ReducerBufferStatus::is_no_more_writers ( ) const

inline

Definition at line 77 of file log_reducer_impl.hpp.

References components, foedus::snapshot::ReducerBufferStatus::Components::flags_, and foedus::snapshot::kFlagNoMoreWriters.

Referenced by foedus::snapshot::LogReducer::handle_process().

                                  {
    return (components.flags_ & kFlagNoMoreWriters) != 0;
  }

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Member Data Documentation

struct foedus::snapshot::ReducerBufferStatus::Components foedus::snapshot::ReducerBufferStatus::components

Referenced by foedus::snapshot::LogReducerRef::append_log_chunk(), get_active_writers(), get_tail_bytes(), get_tail_position(), and is_no_more_writers().

uint64_t foedus::snapshot::ReducerBufferStatus::word

Definition at line 70 of file log_reducer_impl.hpp.

Referenced by foedus::snapshot::LogReducerRef::append_log_chunk(), and foedus::snapshot::LogReducerControlBlock::get_buffer_status_atomic().

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The documentation for this union was generated from the following file:

• /home/shino/foedus_code/foedus-core/include/foedus/snapshot/log_reducer_impl.hpp