Adds byte count to a read stream. More...

#include <rwcounter.h>

Inheritance diagram for scc::util::ReadCounter:

Collaboration diagram for scc::util::ReadCounter:

Public Member Functions
	ReadCounter ()
	Reads will return 0 until reset. More...

	ReadCounter (Reader &)
	Chain using a reference. More...

	ReadCounter (const std::shared_ptr< Reader > &)
	Chain using a shared pointer.

void	read_reset (Reader &)
	Reset the chained reader.

virtual void	read_reset (const std::shared_ptr< Reader > &)
	Reset the chained reader.

virtual std::shared_ptr< Reader >	read_shared () const

virtual size_t	read (void *, size_t)
	Read interface. More...

uint64_t	read_count () const

void	read_count (uint64_t v)

void	read_count_reset ()

uint64_t	read_calls () const

void	read_calls (uint64_t v)

void	read_calls_reset ()

Detailed Description

Adds byte count to a read stream.

Example from scclib/util/unittest/iohelper.cc

    using std::chrono::milliseconds;
    using std::chrono::duration_cast;
 
    struct Slow : public Reader, public Writer
    {
        Slow() {}
        virtual ~Slow() {}
        size_t read(void*, size_t l)
        {
            std::this_thread::sleep_for(milliseconds(50));
            return l;
        }
        size_t write(const void*, size_t l)
        {
            std::this_thread::sleep_for(milliseconds(100));
            return l;
        }
    };
 
    Slow base;
    RwCounter c(base, base);
    RwTimer t(c, c);
    t.read(0, 50);
    t.write(0, 100);
    cout << "read  timer=" << t.read_dur().count() << endl;
    cout << "write timer=" << t.write_dur().count() << endl;
    cout << "read  count=" << c.read_count() << endl;
    cout << "write count=" << c.write_count() << endl;
 
    ASSERT_EQ(duration_cast<milliseconds>(t.read_dur()).count(), 50);
    ASSERT_EQ(duration_cast<milliseconds>(t.write_dur()).count(), 100);
    ASSERT_EQ(c.read_count(), 50);
    ASSERT_EQ(c.write_count(), 100);

Examples: util/unittest/iohelper.cc.

Definition at line 58 of file rwcounter.h.

Constructor & Destructor Documentation

◆ ReadCounter() [1/2]

ReadCounter::ReadCounter ( )

Reads will return 0 until reset.

counters

Definition at line 807 of file iostream.cc.

◆ ReadCounter() [2/2]

ReadCounter::ReadCounter ( Reader & r )

Chain using a reference.

Does not assume ownership.

Definition at line 811 of file iostream.cc.

Member Function Documentation

◆ read()

size_t ReadCounter::read	(	void *	,
		size_t
	)

virtual

Read interface.

Read a block of data to a maximum. Return number of bytes read.

Implements scc::util::Reader.

Definition at line 821 of file iostream.cc.

The documentation for this class was generated from the following files: