pqsignal.h

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/*-------------------------------------------------------------------------
 *
 * pqsignal.h
 *    Backend signal(2) support (see also src/port/pqsignal.c)
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/libpq/pqsignal.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PQSIGNAL_H
#define PQSIGNAL_H
 
#include <signal.h>
 
#ifdef WIN32
/* Emulate POSIX sigset_t APIs on Windows */
typedef int sigset_t;
 
#define SA_RESTART              1
#define SA_NODEFER              2
 
struct sigaction
{
    void        (*sa_handler) (int);
    /* sa_sigaction not yet implemented */
    sigset_t    sa_mask;
    int         sa_flags;
};
 
extern int  pqsigprocmask(int how, const sigset_t *set, sigset_t *oset);
extern int  pqsigaction(int signum, const struct sigaction *act,
                        struct sigaction *oldact);
 
#define SIG_BLOCK               1
#define SIG_UNBLOCK             2
#define SIG_SETMASK             3
#define sigprocmask(how, set, oset) pqsigprocmask((how), (set), (oset))
#define sigaction(signum, act, oldact) pqsigaction((signum), (act), (oldact))
#define sigemptyset(set)        (*(set) = 0)
#define sigfillset(set)         (*(set) = ~0)
#define sigaddset(set, signum)  (*(set) |= (sigmask(signum)))
#define sigdelset(set, signum)  (*(set) &= ~(sigmask(signum)))
#endif                          /* WIN32 */
 
extern PGDLLIMPORT sigset_t UnBlockSig;
extern PGDLLIMPORT sigset_t BlockSig;
extern PGDLLIMPORT sigset_t StartupBlockSig;
 
extern void pqinitmask(void);
 
#endif                          /* PQSIGNAL_H */