eb_statistics Class Reference

Public Member Functions
	eb_statistics (const char *file_up, int nup, const char *file_down, int ndown)
stream_statistics *	up ()
stream_statistics &	up (int i)
stream_statistics *	down ()
stream_statistics &	down (int i)

Private Attributes
int	m_n_u
int	m_n_d
int	m_fd_u
int	m_fd_d
int	m_len_u
int	m_len_d
stream_statistics *	m_stat_u
stream_statistics *	m_stat_d

Detailed Description

Definition at line 30 of file mmap_statistics.h.

Constructor & Destructor Documentation

eb_statistics()

eb_statistics ( const char *  file_up, int  nup, const char *  file_down, int  ndown  )

inline

Definition at line 42 of file mmap_statistics.h.

  {
    m_n_u = nup;
    m_n_d = ndown;
 
    m_len_u = sizeof(stream_statistics) * m_n_u;
    m_len_d = sizeof(stream_statistics) * m_n_d;
 
    m_fd_u = open(file_up,   O_RDWR | O_CREAT | O_NOATIME, 0644);
    assert(m_fd_u >= 0);
    m_fd_d = open(file_down, O_RDWR | O_CREAT | O_NOATIME, 0644);
    assert(m_fd_d >= 0);
 
    stream_statistics buf_u[m_n_u];
    stream_statistics buf_d[m_n_d];
 
    memset(buf_u, 0, m_len_u);
    memset(buf_d, 0, m_len_d);
 
    int ret;
 
    ret = write(m_fd_u, buf_u, m_len_u);
    assert(ret == m_len_u);
    ret = write(m_fd_d, buf_d, m_len_d);
    assert(ret == m_len_d);
 
    m_stat_u = (stream_statistics*)mmap(0, m_len_u, PROT_READ | PROT_WRITE, MAP_SHARED, m_fd_u, 0);
    assert(m_stat_u != MAP_FAILED);
    m_stat_d = (stream_statistics*)mmap(0, m_len_d, PROT_READ | PROT_WRITE, MAP_SHARED, m_fd_d, 0);
    assert(m_stat_d != MAP_FAILED);
  };

~eb_statistics()

~eb_statistics ( )

inline

Definition at line 74 of file mmap_statistics.h.

  {
    munmap(m_stat_u, m_len_u);
    munmap(m_stat_d, m_len_d);
    close(m_fd_u);
    close(m_fd_d);
  };

Member Function Documentation

down() [1/2]

stream_statistics * down ( )

inline

Definition at line 92 of file mmap_statistics.h.

  {
    return m_stat_d;
  };

down() [2/2]

stream_statistics & down ( int  i )

inline

Definition at line 97 of file mmap_statistics.h.

  {
    return m_stat_d[i];
  };

up() [1/2]

stream_statistics * up ( )

inline

Definition at line 82 of file mmap_statistics.h.

  {
    return m_stat_u;
  };

up() [2/2]

stream_statistics & up ( int  i )

inline

Definition at line 87 of file mmap_statistics.h.

  {
    return m_stat_u[i];
  };

Member Data Documentation

m_fd_d

int m_fd_d

private

Definition at line 35 of file mmap_statistics.h.

m_fd_u

int m_fd_u

private

Definition at line 34 of file mmap_statistics.h.

m_len_d

int m_len_d

private

Definition at line 37 of file mmap_statistics.h.

m_len_u

int m_len_u

private

Definition at line 36 of file mmap_statistics.h.

m_n_d

int m_n_d

private

Definition at line 33 of file mmap_statistics.h.

m_n_u

int m_n_u

private

Definition at line 32 of file mmap_statistics.h.

m_stat_d

stream_statistics* m_stat_d

private

Definition at line 39 of file mmap_statistics.h.

m_stat_u

stream_statistics* m_stat_u

private

Definition at line 38 of file mmap_statistics.h.

---

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

• daq/slc/readout/include/mmap_statistics.h