src/core/iomgr/pollset_kick.h

/*
 *
 * Copyright 2015, Google Inc.
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#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_KICK_H
#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_KICK_H

#include <grpc/support/port_platform.h>

#ifdef GPR_POSIX_SOCKET
#include "src/core/iomgr/pollset_kick_posix.h"
#endif

#ifdef GPR_WIN32
#include "src/core/iomgr/pollset_kick_windows.h"
#endif

/* This is an abstraction around the typical pipe mechanism for waking up a
   thread sitting in a poll() style call. */

void grpc_pollset_kick_global_init(void);
void grpc_pollset_kick_global_destroy(void);

void grpc_pollset_kick_init(grpc_pollset_kick_state *kick_state);
void grpc_pollset_kick_destroy(grpc_pollset_kick_state *kick_state);

/* Guarantees a pure posix implementation rather than a specialized one, if
 * applicable. Intended for testing. */
void grpc_pollset_kick_global_init_fallback_fd(void);

/* Must be called before entering poll(). If return value is -1, this consumed
   an existing kick. Otherwise the return value is an FD to add to the poll set.
 */
int grpc_pollset_kick_pre_poll(grpc_pollset_kick_state *kick_state);

/* Consume an existing kick. Must be called after poll returns that the fd was
   readable, and before calling kick_post_poll. */
void grpc_pollset_kick_consume(grpc_pollset_kick_state *kick_state);

/* Must be called after pre_poll, and after consume if applicable */
void grpc_pollset_kick_post_poll(grpc_pollset_kick_state *kick_state);

void grpc_pollset_kick_kick(grpc_pollset_kick_state *kick_state);

#endif  /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_KICK_H */