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✏️ Editing: mysql_socket.h

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.

This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation.  The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License, version 2.0, for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1335  USA
*/

#ifndef MYSQL_SOCKET_H
#define MYSQL_SOCKET_H

/* For MY_STAT */
#include <my_dir.h>
/* For my_chsize */
#include <my_sys.h>
/* For socket api */
#ifdef _WIN32
  #include <ws2def.h>
  #include <winsock2.h>
  #include <MSWSock.h>
  #define SOCKBUF_T char
#else
  #include <netinet/in.h>
  #define SOCKBUF_T void
#endif
/**
  @file mysql/psi/mysql_socket.h
[...]
*/

#include "mysql/psi/psi.h"

#ifndef PSI_SOCKET_CALL
#define PSI_SOCKET_CALL(M) PSI_DYNAMIC_CALL(M)
#endif

/**
  @defgroup Socket_instrumentation Socket Instrumentation
  @ingroup Instrumentation_interface
  @{
*/

/**
  @def mysql_socket_register(P1, P2, P3)
  Socket registration.
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_register(P1, P2, P3) \
    inline_mysql_socket_register(P1, P2, P3)
#else
  #define mysql_socket_register(P1, P2, P3) \
    do {} while (0)
#endif

/** An instrumented socket. */
struct st_mysql_socket
{
  /** The real socket descriptor. */
  my_socket fd;

/** Is this a Unix-domain socket? */
  char is_unix_domain_socket;

/** Is this a socket opened for the extra port? */
  char is_extra_port;

/** Address family of the socket. (See sa_family from struct sockaddr). */
  unsigned short address_family;

/**
    The instrumentation hook.
    Note that this hook is not conditionally defined,
    for binary compatibility of the @c MYSQL_SOCKET interface.
  */
  struct PSI_socket *m_psi;
};

/**
  An instrumented socket.
  @c MYSQL_SOCKET is a replacement for @c my_socket.
*/
typedef struct st_mysql_socket MYSQL_SOCKET;

/**
  @def MYSQL_INVALID_SOCKET
  MYSQL_SOCKET initial value.
*/
//MYSQL_SOCKET MYSQL_INVALID_SOCKET= {INVALID_SOCKET, NULL};
#define MYSQL_INVALID_SOCKET mysql_socket_invalid()

/**
  MYSQL_SOCKET helper. Initialize instrumented socket.
  @sa mysql_socket_getfd
  @sa mysql_socket_setfd
*/
static inline MYSQL_SOCKET
mysql_socket_invalid()
{
  MYSQL_SOCKET mysql_socket= {INVALID_SOCKET, 0, 0, 0, NULL};
  return mysql_socket;
}

/**
  Set socket descriptor and address.
  @param socket nstrumented socket
  @param addr unformatted socket address
  @param addr_len length of socket address
*/

static inline void
mysql_socket_set_address(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  MYSQL_SOCKET socket,
  const struct sockaddr *addr,
  socklen_t addr_len
#else
  MYSQL_SOCKET socket __attribute__ ((unused)),
  const struct sockaddr *addr __attribute__ ((unused)),
  socklen_t addr_len __attribute__ ((unused))
#endif
)
{
#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (socket.m_psi != NULL)
    PSI_SOCKET_CALL(set_socket_info)(socket.m_psi, NULL, addr, addr_len);
#endif
}

/**
  Set socket descriptor and address.
  @param socket instrumented socket
*/
static inline void
mysql_socket_set_thread_owner(
#ifdef HAVE_PSI_SOCKET_INTERFACE
MYSQL_SOCKET socket
#else
MYSQL_SOCKET socket __attribute__ ((unused))
#endif
)
{
#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (socket.m_psi != NULL)
    PSI_SOCKET_CALL(set_socket_thread_owner)(socket.m_psi);
#endif
}

/**
  MYSQL_SOCKET helper. Get socket descriptor.
  @param mysql_socket Instrumented socket
  @sa mysql_socket_getfd
*/
static inline my_socket
mysql_socket_getfd(MYSQL_SOCKET mysql_socket)
{
  return mysql_socket.fd;
}

/**
  MYSQL_SOCKET helper. Set socket descriptor.
  @param mysql_socket Instrumented socket
  @param fd Socket descriptor
  @sa mysql_socket_setfd
*/
static inline void
mysql_socket_setfd(MYSQL_SOCKET *mysql_socket, my_socket fd)
{
  if (likely(mysql_socket != NULL))
    mysql_socket->fd= fd;
}

/**
  @def MYSQL_SOCKET_WAIT_VARIABLES
  Instrumentation helper for socket waits.
  This instrumentation declares local variables.
  Do not use a ';' after this macro
  @param LOCKER locker
  @param STATE locker state
  @sa MYSQL_START_SOCKET_WAIT.
  @sa MYSQL_END_SOCKET_WAIT.
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define MYSQL_SOCKET_WAIT_VARIABLES(LOCKER, STATE) \
    struct PSI_socket_locker* LOCKER; \
    PSI_socket_locker_state STATE;
#else
  #define MYSQL_SOCKET_WAIT_VARIABLES(LOCKER, STATE)
#endif

/**
  @def MYSQL_START_SOCKET_WAIT
  Instrumentation helper for socket waits.
  This instrumentation marks the start of a wait event.
  @param LOCKER locker
  @param STATE locker state
  @param SOCKET instrumented socket
  @param OP The socket operation to be performed
  @param COUNT bytes to be written/read
  @sa MYSQL_END_SOCKET_WAIT.
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define MYSQL_START_SOCKET_WAIT(LOCKER, STATE, SOCKET, OP, COUNT) \
    LOCKER= inline_mysql_start_socket_wait(STATE, SOCKET, OP, COUNT,\
                                           __FILE__, __LINE__)
#else
  #define MYSQL_START_SOCKET_WAIT(LOCKER, STATE, SOCKET, OP, COUNT) \
    do {} while (0)
#endif

/**
  @def MYSQL_END_SOCKET_WAIT
  Instrumentation helper for socket waits.
  This instrumentation marks the end of a wait event.
  @param LOCKER locker
  @param COUNT actual bytes written/read, or -1
  @sa MYSQL_START_SOCKET_WAIT.
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define MYSQL_END_SOCKET_WAIT(LOCKER, COUNT) \
    inline_mysql_end_socket_wait(LOCKER, COUNT)
#else
  #define MYSQL_END_SOCKET_WAIT(LOCKER, COUNT) \
    do {} while (0)
#endif

/**
  @def MYSQL_SOCKET_SET_STATE
  Set the state (IDLE, ACTIVE) of an instrumented socket.
  @param SOCKET the instrumented socket
  @param STATE the new state
  @sa PSI_socket_state
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define MYSQL_SOCKET_SET_STATE(SOCKET, STATE) \
    inline_mysql_socket_set_state(SOCKET, STATE)
#else
  #define MYSQL_SOCKET_SET_STATE(SOCKET, STATE) \
    do {} while (0)
#endif

#ifdef HAVE_PSI_SOCKET_INTERFACE
/**
  Instrumentation calls for MYSQL_START_SOCKET_WAIT.
  @sa MYSQL_START_SOCKET_WAIT.
*/
static inline struct PSI_socket_locker*
inline_mysql_start_socket_wait(PSI_socket_locker_state *state,
                               MYSQL_SOCKET mysql_socket,
                               enum PSI_socket_operation op,
                               size_t byte_count,
                               const char *src_file, uint src_line)
{
  struct PSI_socket_locker *locker;
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (state, mysql_socket.m_psi, op, byte_count, src_file, src_line);
  }
  else
    locker= NULL;
  return locker;
}

/**
  Instrumentation calls for MYSQL_END_SOCKET_WAIT.
  @sa MYSQL_END_SOCKET_WAIT.
*/
static inline void
inline_mysql_end_socket_wait(struct PSI_socket_locker *locker, size_t byte_count)
{
  if (psi_likely(locker != NULL))
    PSI_SOCKET_CALL(end_socket_wait)(locker, byte_count);
}

/**
  Set the state (IDLE, ACTIVE) of an instrumented socket.
  @param socket the instrumented socket
  @param state the new state
  @sa PSI_socket_state
*/
static inline void
inline_mysql_socket_set_state(MYSQL_SOCKET socket, enum PSI_socket_state state)
{
  if (socket.m_psi != NULL)
    PSI_SOCKET_CALL(set_socket_state)(socket.m_psi, state);
}
#endif /* HAVE_PSI_SOCKET_INTERFACE */

/**
  @def mysql_socket_fd(K, F)
  Create a socket.
  @c mysql_socket_fd is a replacement for @c socket.
  @param K PSI_socket_key for this instrumented socket
  @param F File descriptor
*/

#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_fd(K, F) \
    inline_mysql_socket_fd(K, F)
#else
  #define mysql_socket_fd(K, F) \
    inline_mysql_socket_fd(F)
#endif

/**
  @def mysql_socket_socket(K, D, T, P)
  Create a socket.
  @c mysql_socket_socket is a replacement for @c socket.
  @param K PSI_socket_key for this instrumented socket
  @param D Socket domain
  @param T Protocol type
  @param P Transport protocol
*/

#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_socket(K, D, T, P) \
    inline_mysql_socket_socket(K, D, T, P)
#else
  #define mysql_socket_socket(K, D, T, P) \
    inline_mysql_socket_socket(D, T, P)
#endif

/**
  @def mysql_socket_bind(FD, AP, L)
  Bind a socket to a local port number and IP address
  @c mysql_socket_bind is a replacement for @c bind.
  @param FD Instrumented socket descriptor returned by socket()
  @param AP Pointer to local port number and IP address in sockaddr structure
  @param L  Length of sockaddr structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_bind(FD, AP, L) \
    inline_mysql_socket_bind(__FILE__, __LINE__, FD, AP, L)
#else
  #define mysql_socket_bind(FD, AP, L) \
    inline_mysql_socket_bind(FD, AP, L)
#endif

/**
  @def mysql_socket_getsockname(FD, AP, LP)
  Return port number and IP address of the local host
  @c mysql_socket_getsockname is a replacement for @c getsockname.
  @param FD Instrumented socket descriptor returned by socket()
  @param AP  Pointer to returned address of local host in @c sockaddr structure
  @param LP  Pointer to length of @c sockaddr structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_getsockname(FD, AP, LP) \
    inline_mysql_socket_getsockname(__FILE__, __LINE__, FD, AP, LP)
#else
  #define mysql_socket_getsockname(FD, AP, LP) \
    inline_mysql_socket_getsockname(FD, AP, LP)
#endif

/**
  @def mysql_socket_connect(FD, AP, L)
  Establish a connection to a remote host.
  @c mysql_socket_connect is a replacement for @c connect.
  @param FD Instrumented socket descriptor returned by socket()
  @param AP Pointer to target address in sockaddr structure
  @param L  Length of sockaddr structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_connect(FD, AP, L) \
    inline_mysql_socket_connect(__FILE__, __LINE__, FD, AP, L)
#else
  #define mysql_socket_connect(FD, AP, L) \
    inline_mysql_socket_connect(FD, AP, L)
#endif

/**
  @def mysql_socket_getpeername(FD, AP, LP)
  Get port number and IP address of remote host that a socket is connected to.
  @c mysql_socket_getpeername is a replacement for @c getpeername.
  @param FD Instrumented socket descriptor returned by socket() or accept()
  @param AP Pointer to returned address of remote host in sockaddr structure
  @param LP Pointer to length of sockaddr structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_getpeername(FD, AP, LP) \
    inline_mysql_socket_getpeername(__FILE__, __LINE__, FD, AP, LP)
#else
  #define mysql_socket_getpeername(FD, AP, LP) \
    inline_mysql_socket_getpeername(FD, AP, LP)
#endif

/**
  @def mysql_socket_send(FD, B, N, FL)
  Send data from the buffer, B, to a connected socket.
  @c mysql_socket_send is a replacement for @c send.
  @param FD Instrumented socket descriptor returned by socket() or accept()
  @param B  Buffer to send
  @param N  Number of bytes to send
  @param FL Control flags
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_send(FD, B, N, FL) \
    inline_mysql_socket_send(__FILE__, __LINE__, FD, B, N, FL)
#else
  #define mysql_socket_send(FD, B, N, FL) \
    inline_mysql_socket_send(FD, B, N, FL)
#endif

/**
  @def mysql_socket_recv(FD, B, N, FL)
  Receive data from a connected socket.
  @c mysql_socket_recv is a replacement for @c recv.
  @param FD Instrumented socket descriptor returned by socket() or accept()
  @param B  Buffer to receive to
  @param N  Maximum bytes to receive
  @param FL Control flags
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_recv(FD, B, N, FL) \
    inline_mysql_socket_recv(__FILE__, __LINE__, FD, B, N, FL)
#else
  #define mysql_socket_recv(FD, B, N, FL) \
    inline_mysql_socket_recv(FD, B, N, FL)
#endif

/**
  @def mysql_socket_sendto(FD, B, N, FL, AP, L)
  Send data to a socket at the specified address.
  @c mysql_socket_sendto is a replacement for @c sendto.
  @param FD Instrumented socket descriptor returned by socket()
  @param B  Buffer to send
  @param N  Number of bytes to send
  @param FL Control flags
  @param AP Pointer to destination sockaddr structure
  @param L  Size of sockaddr structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_sendto(FD, B, N, FL, AP, L) \
    inline_mysql_socket_sendto(__FILE__, __LINE__, FD, B, N, FL, AP, L)
#else
  #define mysql_socket_sendto(FD, B, N, FL, AP, L) \
    inline_mysql_socket_sendto(FD, B, N, FL, AP, L)
#endif

/**
  @def mysql_socket_recvfrom(FD, B, N, FL, AP, L)
  Receive data from a socket and return source address information
  @c mysql_socket_recvfrom is a replacement for @c recvfrom.
  @param FD Instrumented socket descriptor returned by socket()
  @param B  Buffer to receive to
  @param N  Maximum bytes to receive
  @param FL Control flags
  @param AP Pointer to source address in sockaddr_storage structure
  @param LP Size of sockaddr_storage structure
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_recvfrom(FD, B, N, FL, AP, LP) \
    inline_mysql_socket_recvfrom(__FILE__, __LINE__, FD, B, N, FL, AP, LP)
#else
  #define mysql_socket_recvfrom(FD, B, N, FL, AP, LP) \
    inline_mysql_socket_recvfrom(FD, B, N, FL, AP, LP)
#endif

/**
  @def mysql_socket_getsockopt(FD, LV, ON, OP, OL)
  Get a socket option for the specified socket.
  @c mysql_socket_getsockopt is a replacement for @c getsockopt.
  @param FD Instrumented socket descriptor returned by socket()
  @param LV Protocol level
  @param ON Option to query
  @param OP Buffer which will contain the value for the requested option
  @param OL Pointer to length of OP
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_getsockopt(FD, LV, ON, OP, OL) \
    inline_mysql_socket_getsockopt(__FILE__, __LINE__, FD, LV, ON, OP, OL)
#else
  #define mysql_socket_getsockopt(FD, LV, ON, OP, OL) \
    inline_mysql_socket_getsockopt(FD, LV, ON, OP, OL)
#endif

/**
  @def mysql_socket_setsockopt(FD, LV, ON, OP, OL)
  Set a socket option for the specified socket.
  @c mysql_socket_setsockopt is a replacement for @c setsockopt.
  @param FD Instrumented socket descriptor returned by socket()
  @param LV Protocol level
  @param ON Option to modify
  @param OP Buffer containing the value for the specified option
  @param OL Pointer to length of OP
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_setsockopt(FD, LV, ON, OP, OL) \
    inline_mysql_socket_setsockopt(__FILE__, __LINE__, FD, LV, ON, OP, OL)
#else
  #define mysql_socket_setsockopt(FD, LV, ON, OP, OL) \
    inline_mysql_socket_setsockopt(FD, LV, ON, OP, OL)
#endif

/**
  @def mysql_sock_set_nonblocking
  Set socket to non-blocking.
  @param FD instrumented socket descriptor
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_sock_set_nonblocking(FD) \
    inline_mysql_sock_set_nonblocking(__FILE__, __LINE__, FD)
#else
  #define mysql_sock_set_nonblocking(FD) \
    inline_mysql_sock_set_nonblocking(FD)
#endif

/**
  @def mysql_socket_listen(FD, N)
  Set socket state to listen for an incoming connection.
  @c mysql_socket_listen is a replacement for @c listen.
  @param FD Instrumented socket descriptor, bound and connected
  @param N  Maximum number of pending connections allowed.
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_listen(FD, N) \
    inline_mysql_socket_listen(__FILE__, __LINE__, FD, N)
#else
  #define mysql_socket_listen(FD, N) \
    inline_mysql_socket_listen(FD, N)
#endif

/**
  @def mysql_socket_accept(K, FD, AP, LP)
  Accept a connection from any remote host; TCP only.
  @c mysql_socket_accept is a replacement for @c accept.
  @param K PSI_socket_key for this instrumented socket
  @param FD Instrumented socket descriptor, bound and placed in a listen state
  @param AP Pointer to sockaddr structure with returned IP address and port of connected host
  @param LP Pointer to length of valid information in AP
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_accept(K, FD, AP, LP) \
    inline_mysql_socket_accept(__FILE__, __LINE__, K, FD, AP, LP)
#else
  #define mysql_socket_accept(K, FD, AP, LP) \
    inline_mysql_socket_accept(FD, AP, LP)
#endif

/**
  @def mysql_socket_close(FD)
  Close a socket and sever any connections.
  @c mysql_socket_close is a replacement for @c close.
  @param FD Instrumented socket descriptor returned by socket() or accept()
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_close(FD) \
    inline_mysql_socket_close(__FILE__, __LINE__, FD)
#else
  #define mysql_socket_close(FD) \
    inline_mysql_socket_close(FD)
#endif

/**
  @def mysql_socket_shutdown(FD, H)
  Disable receives and/or sends on a socket.
  @c mysql_socket_shutdown is a replacement for @c shutdown.
  @param FD Instrumented socket descriptor returned by socket() or accept()
  @param H  Specifies which operations to shutdown
*/
#ifdef HAVE_PSI_SOCKET_INTERFACE
  #define mysql_socket_shutdown(FD, H) \
    inline_mysql_socket_shutdown(__FILE__, __LINE__, FD, H)
#else
  #define mysql_socket_shutdown(FD, H) \
    inline_mysql_socket_shutdown(FD, H)
#endif

#ifdef HAVE_PSI_SOCKET_INTERFACE
static inline void inline_mysql_socket_register(
  const char *category,
  PSI_socket_info *info,
  int count)
{
  PSI_SOCKET_CALL(register_socket)(category, info, count);
}
#endif

/** mysql_socket_fd */

static inline MYSQL_SOCKET
inline_mysql_socket_fd
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  PSI_socket_key key,
#endif
  int fd)
{
  MYSQL_SOCKET mysql_socket= MYSQL_INVALID_SOCKET;
  mysql_socket.fd= fd;

DBUG_ASSERT(mysql_socket.fd != INVALID_SOCKET);
#ifdef HAVE_PSI_SOCKET_INTERFACE
  mysql_socket.m_psi= PSI_SOCKET_CALL(init_socket)
    (key, (const my_socket*)&mysql_socket.fd, NULL, 0);
#endif
  /**
    Currently systemd socket activation is the user of this
    function. Its API (man sd_listen_fds) says FD_CLOSE_EXEC
    is already called. If there becomes another user, we
    can call it again without detriment.

If needed later:
    #if defined(HAVE_FCNTL) && defined(FD_CLOEXEC)
        (void) fcntl(mysql_socket.fd, F_SETFD, FD_CLOEXEC);
    #endif
  */

return mysql_socket;
}

/** mysql_socket_socket */

static inline MYSQL_SOCKET
inline_mysql_socket_socket
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  PSI_socket_key key,
#endif
  int domain, int type, int protocol)
{
  MYSQL_SOCKET mysql_socket= MYSQL_INVALID_SOCKET;
  mysql_socket.fd= socket(domain, type | SOCK_CLOEXEC, protocol);

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (likely(mysql_socket.fd != INVALID_SOCKET))
  {
    mysql_socket.m_psi= PSI_SOCKET_CALL(init_socket)
      (key, (const my_socket*)&mysql_socket.fd, NULL, 0);
  }
#endif

/* SOCK_CLOEXEC isn't always a number - can't preprocessor compare */
#if defined(HAVE_FCNTL) && defined(FD_CLOEXEC) && !defined(HAVE_SOCK_CLOEXEC)
  (void) fcntl(mysql_socket.fd, F_SETFD, FD_CLOEXEC);
#endif

return mysql_socket;
}

/** mysql_socket_bind */

static inline int
inline_mysql_socket_bind
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
  MYSQL_SOCKET mysql_socket, const struct sockaddr *addr, size_t len)
{
  int result;

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    /* Instrumentation start */
    PSI_socket_locker_state state;
    PSI_socket_locker *locker;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_BIND, (size_t)0, src_file, src_line);

/* Instrumented code */
    result= bind(mysql_socket.fd, addr, (int)len);

/* Instrumentation end */
    if (result == 0)
      PSI_SOCKET_CALL(set_socket_info)(mysql_socket.m_psi, NULL, addr, (socklen_t)len);

if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= bind(mysql_socket.fd, addr, (int)len);
  return result;
}

/** mysql_socket_getsockname */

static inline int
inline_mysql_socket_getsockname
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, struct sockaddr *addr, socklen_t *len)
{
  int result;

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_BIND, (size_t)0, src_file, src_line);

/* Instrumented code */
    result= getsockname(mysql_socket.fd, addr, len);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= getsockname(mysql_socket.fd, addr, len);

return result;
}

/** mysql_socket_connect */

static inline int
inline_mysql_socket_connect
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, const struct sockaddr *addr, socklen_t len)
{
  int result;

/* Instrumented code */
    result= connect(mysql_socket.fd, addr, len);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= connect(mysql_socket.fd, addr, len);

return result;
}

/** mysql_socket_getpeername */

static inline int
inline_mysql_socket_getpeername
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, struct sockaddr *addr, socklen_t *len)
{
  int result;

/* Instrumented code */
    result= getpeername(mysql_socket.fd, addr, len);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= getpeername(mysql_socket.fd, addr, len);

return result;
}

/** mysql_socket_send */

static inline ssize_t
inline_mysql_socket_send
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, const SOCKBUF_T *buf, size_t n, int flags)
{
  ssize_t result;
  DBUG_ASSERT(mysql_socket.fd != INVALID_SOCKET);
#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_SEND, n, src_file, src_line);

/* Instrumented code */
    result= send(mysql_socket.fd, buf, IF_WIN((int),) n, flags);

/* Instrumentation end */
    if (locker != NULL)
    {
      size_t bytes_written= (result > 0) ? (size_t) result : 0;
      PSI_SOCKET_CALL(end_socket_wait)(locker, bytes_written);
    }

return result;
  }
#endif

/* Non instrumented code */
  result= send(mysql_socket.fd, buf, IF_WIN((int),) n, flags);

return result;
}

/** mysql_socket_recv */

static inline ssize_t
inline_mysql_socket_recv
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket,  SOCKBUF_T *buf, size_t n, int flags)
{
  ssize_t result;
  DBUG_ASSERT(mysql_socket.fd != INVALID_SOCKET);
#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_RECV, (size_t)0, src_file, src_line);

/* Instrumented code */
    result= recv(mysql_socket.fd, buf, IF_WIN((int),) n, flags);

/* Instrumentation end */
    if (locker != NULL)
    {
      size_t bytes_read= (result > 0) ? (size_t) result : 0;
      PSI_SOCKET_CALL(end_socket_wait)(locker, bytes_read);
    }

return result;
  }
#endif

/* Non instrumented code */
  result= recv(mysql_socket.fd, buf, IF_WIN((int),) n, flags);

return result;
}

/** mysql_socket_sendto */

static inline ssize_t
inline_mysql_socket_sendto
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, const SOCKBUF_T *buf, size_t n, int flags, const struct sockaddr *addr, socklen_t addr_len)
{
  ssize_t result;

/* Instrumented code */
    result= sendto(mysql_socket.fd, buf, IF_WIN((int),) n, flags, addr, addr_len);

/* Instrumentation end */
    if (locker != NULL)
    {
      size_t bytes_written = (result > 0) ? (size_t) result : 0;
      PSI_SOCKET_CALL(end_socket_wait)(locker, bytes_written);
    }

return result;
  }
#endif

/* Non instrumented code */
  result= sendto(mysql_socket.fd, buf, IF_WIN((int),) n, flags, addr, addr_len);

return result;
}

/** mysql_socket_recvfrom */

static inline ssize_t
inline_mysql_socket_recvfrom
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, SOCKBUF_T *buf, size_t n, int flags,
 struct sockaddr *addr, socklen_t *addr_len)
{
  ssize_t result;

/* Instrumented code */
    result= recvfrom(mysql_socket.fd, buf, IF_WIN((int),) n, flags, addr, addr_len);

/* Instrumentation end */
    if (locker != NULL)
    {
      size_t bytes_read= (result > 0) ? (size_t) result : 0;
      PSI_SOCKET_CALL(end_socket_wait)(locker, bytes_read);
    }

return result;
  }
#endif

/* Non instrumented code */
  result= recvfrom(mysql_socket.fd, buf, IF_WIN((int),) n, flags, addr, addr_len);

return result;
}

/** mysql_socket_getsockopt */

static inline int
inline_mysql_socket_getsockopt
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, int level, int optname, SOCKBUF_T *optval, socklen_t *optlen)
{
  int result;

/* Instrumented code */
    result= getsockopt(mysql_socket.fd, level, optname, optval, optlen);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= getsockopt(mysql_socket.fd, level, optname, optval, optlen);

return result;
}

/** mysql_socket_setsockopt */

static inline int
inline_mysql_socket_setsockopt
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, int level, int optname, const SOCKBUF_T *optval,
 socklen_t optlen)
{
  int result;

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi))
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_OPT, (size_t)0, src_file, src_line);

/* Instrumented code */
    result= setsockopt(mysql_socket.fd, level, optname, optval, optlen);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= setsockopt(mysql_socket.fd, level, optname, optval, optlen);

return result;
}

/** set_socket_nonblock */
static inline int
set_socket_nonblock(my_socket fd)
{
  int ret= 0;
#ifdef _WIN32
  {
    u_long nonblocking= 1;
    ret= ioctlsocket(fd, FIONBIO, &nonblocking);
  }
#else
  {
    int fd_flags;
    fd_flags= fcntl(fd, F_GETFL, 0);
    if (fd_flags < 0)
      return errno;
#if defined(O_NONBLOCK)
    fd_flags |= O_NONBLOCK;
#elif defined(O_NDELAY)
    fd_flags |= O_NDELAY;
#elif defined(O_FNDELAY)
    fd_flags |= O_FNDELAY;
#else
#error "No definition of non-blocking flag found."
#endif /* O_NONBLOCK */
    if (fcntl(fd, F_SETFL, fd_flags) == -1)
      ret= errno;
  }
#endif /* _WIN32 */
  return ret;
}

/** mysql_socket_set_nonblocking */

static inline int
inline_mysql_sock_set_nonblocking
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
  MYSQL_SOCKET mysql_socket
)
{
  int result= 0;

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (mysql_socket.m_psi)
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
        (&state, mysql_socket.m_psi, PSI_SOCKET_OPT,
         (size_t)0, src_file, src_line);

/* Instrumented code */
    result= set_socket_nonblock(mysql_socket.fd);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= set_socket_nonblock(mysql_socket.fd);

return result;
}

/** mysql_socket_listen */

static inline int
inline_mysql_socket_listen
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
 MYSQL_SOCKET mysql_socket, int backlog)
{
  int result;

/* Instrumented code */
    result= listen(mysql_socket.fd, backlog);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
  result= listen(mysql_socket.fd, backlog);

return result;
}

/** mysql_socket_accept */

static inline MYSQL_SOCKET
inline_mysql_socket_accept
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line, PSI_socket_key key,
#endif
  MYSQL_SOCKET socket_listen, struct sockaddr *addr, socklen_t *addr_len)
{
#ifdef FD_CLOEXEC
  int flags __attribute__ ((unused));
#endif

MYSQL_SOCKET socket_accept;

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (socket_listen.m_psi != NULL)
  {
    /* Instrumentation start */
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, socket_listen.m_psi, PSI_SOCKET_CONNECT, (size_t)0, src_file, src_line);

/* Instrumented code */
#ifdef HAVE_ACCEPT4
    socket_accept.fd= accept4(socket_listen.fd, addr, addr_len, SOCK_CLOEXEC);
#else
    socket_accept.fd= accept(socket_listen.fd, addr, addr_len);
#ifdef FD_CLOEXEC
    if (socket_accept.fd != INVALID_SOCKET)
    {
      flags= fcntl(socket_accept.fd, F_GETFD);
      if (flags != -1)
      {
        flags |= FD_CLOEXEC;
        fcntl(socket_accept.fd, F_SETFD, flags);
      }
    }
#endif
#endif

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);
  }
  else
#endif
  {
    /* Non instrumented code */
#ifdef HAVE_ACCEPT4
    socket_accept.fd= accept4(socket_listen.fd, addr, addr_len, SOCK_CLOEXEC);
#else
    socket_accept.fd= accept(socket_listen.fd, addr, addr_len);
#ifdef FD_CLOEXEC
    if (socket_accept.fd != INVALID_SOCKET)
    {
      flags= fcntl(socket_accept.fd, F_GETFD);
      if (flags != -1)
      {
        flags |= FD_CLOEXEC;
        fcntl(socket_accept.fd, F_SETFD, flags);
      }
    }
#endif
#endif
  }

#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (likely(socket_accept.fd != INVALID_SOCKET))
  {
    /* Initialize the instrument with the new socket descriptor and address */
    socket_accept.m_psi= PSI_SOCKET_CALL(init_socket)
      (key, (const my_socket*)&socket_accept.fd, addr, *addr_len);
  }
#endif

return socket_accept;
}

/** mysql_socket_close */

static inline int
inline_mysql_socket_close
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
  MYSQL_SOCKET mysql_socket)
{
  int result;

/* Instrumented code */
    result= closesocket(mysql_socket.fd);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);
    /* Remove the instrumentation for this socket. */
    if (mysql_socket.m_psi != NULL)
      PSI_SOCKET_CALL(destroy_socket)(mysql_socket.m_psi);

return result;
  }
#endif

/* Non instrumented code */
  result= closesocket(mysql_socket.fd);

return result;
}

/** mysql_socket_shutdown */

static inline int
inline_mysql_socket_shutdown
(
#ifdef HAVE_PSI_SOCKET_INTERFACE
  const char *src_file, uint src_line,
#endif
  MYSQL_SOCKET mysql_socket, int how)
{
  int result;

#ifdef _WIN32
  static LPFN_DISCONNECTEX DisconnectEx = NULL;
  if (DisconnectEx == NULL)
  {
    DWORD dwBytesReturned;
    GUID guidDisconnectEx = WSAID_DISCONNECTEX;
    WSAIoctl(mysql_socket.fd, SIO_GET_EXTENSION_FUNCTION_POINTER,
             &guidDisconnectEx, sizeof(GUID),
             &DisconnectEx, sizeof(DisconnectEx), 
             &dwBytesReturned, NULL, NULL);
  }
#endif

/* Instrumentation start */
#ifdef HAVE_PSI_SOCKET_INTERFACE
  if (psi_likely(mysql_socket.m_psi != NULL))
  {
    PSI_socket_locker *locker;
    PSI_socket_locker_state state;
    locker= PSI_SOCKET_CALL(start_socket_wait)
      (&state, mysql_socket.m_psi, PSI_SOCKET_SHUTDOWN, (size_t)0, src_file, src_line);

/* Instrumented code */
#ifdef _WIN32
    if (DisconnectEx)
      result= (DisconnectEx(mysql_socket.fd, (LPOVERLAPPED) NULL,
                            (DWORD) 0, (DWORD) 0) == TRUE) ? 0 : -1;
    else
#endif
      result= shutdown(mysql_socket.fd, how);

/* Instrumentation end */
    if (locker != NULL)
      PSI_SOCKET_CALL(end_socket_wait)(locker, (size_t)0);

return result;
  }
#endif

/* Non instrumented code */
#ifdef _WIN32
  if (DisconnectEx)
    result= (DisconnectEx(mysql_socket.fd, (LPOVERLAPPED) NULL,
                          (DWORD) 0, (DWORD) 0) == TRUE) ? 0 : -1;
  else
#endif
    result= shutdown(mysql_socket.fd, how);

return result;
}

/** @} (end of group Socket_instrumentation) */

#endif

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