source: libcfa/src/concurrency/iofwd.hfa@ 441a6a7

//
// Cforall Version 1.0.0 Copyright (C) 2020 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// iofwd.hfa --
//
// Author           : Thierry Delisle
// Created On       : Thu Apr 23 17:31:00 2020
// Last Modified By :
// Last Modified On :
// Update Count     :
//

#pragma once

#include <unistd.h>
extern "C" {
        #include <asm/types.h>
        #include <sys/stat.h> // needed for mode_t
        #if CFA_HAVE_LINUX_IO_URING_H
                #include <linux/io_uring.h>
        #endif
}
#include "bits/defs.hfa"
#include "kernel/fwd.hfa"
#include "time.hfa"

#if defined(CFA_HAVE_IOSQE_FIXED_FILE)
        #define CFA_IO_FIXED_FD1 IOSQE_FIXED_FILE
#endif
#if defined(CFA_HAVE_SPLICE_F_FD_IN_FIXED)
        #define CFA_IO_FIXED_FD2 SPLICE_F_FD_IN_FIXED
#endif
#if defined(CFA_HAVE_IOSQE_IO_DRAIN)
        #define CFA_IO_DRAIN IOSQE_IO_DRAIN
#endif
#if defined(CFA_HAVE_IOSQE_ASYNC)
        #define CFA_IO_ASYNC IOSQE_ASYNC
#endif

#if __OFF_T_MATCHES_OFF64_T
        typedef __off64_t off_t;
#else
        typedef __off_t off_t;
#endif
typedef __off64_t off64_t;

struct cluster;
struct io_context$;

struct iovec;
struct msghdr;
struct sockaddr;
struct statx;
struct epoll_event;

struct io_uring_sqe;

//-----------------------------------------------------------------------
// IO user data
struct io_future_t {
        future_t self;
        __s32 result;
};

static inline {
        thread$ * fulfil( io_future_t & this, __s32 result, bool do_unpark = true ) {
                this.result = result;
                return fulfil(this.self, do_unpark);
        }

        // Wait for the future to be fulfilled
        bool wait     ( io_future_t & this ) { return wait     (this.self); }
        void reset    ( io_future_t & this ) { return reset    (this.self); }
        bool available( io_future_t & this ) { return available(this.self); }
        bool setup    ( io_future_t & this, oneshot & ctx ) { return setup  (this.self, ctx); }
        bool retract  ( io_future_t & this, oneshot & ctx ) { return retract(this.self, ctx); }
}

//----------
// underlying calls
extern struct io_context$ * cfa_io_allocate(struct io_uring_sqe * out_sqes[], __u32 out_idxs[], __u32 want)  __attribute__((nonnull (1,2)));
extern void cfa_io_submit( struct io_context$ * in_ctx, __u32 in_idxs[], __u32 have, bool lazy ) __attribute__((nonnull (1,2)));

//----------
// synchronous calls
#if defined(CFA_HAVE_PREADV2)
        extern ssize_t cfa_preadv2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags, __u64 submit_flags);
#endif
#if defined(CFA_HAVE_PWRITEV2)
        extern ssize_t cfa_pwritev2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags, __u64 submit_flags);
#endif
extern int cfa_fsync(int fd, __u64 submit_flags);
extern int cfa_epoll_ctl(int epfd, int op, int fd, struct epoll_event *event, __u64 submit_flags);
extern int cfa_sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags, __u64 submit_flags);
extern  ssize_t cfa_sendmsg(int sockfd, const struct msghdr *msg, int flags, __u64 submit_flags);
extern ssize_t cfa_recvmsg(int sockfd, struct msghdr *msg, int flags, __u64 submit_flags);
extern ssize_t cfa_send(int sockfd, const void *buf, size_t len, int flags, __u64 submit_flags);
extern ssize_t cfa_recv(int sockfd, void *buf, size_t len, int flags, __u64 submit_flags);
extern int cfa_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags, __u64 submit_flags);
extern int cfa_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen, __u64 submit_flags);
extern int cfa_fallocate(int fd, int mode, off_t offset, off_t len, __u64 submit_flags);
extern int cfa_posix_fadvise(int fd, off_t offset, off_t len, int advice, __u64 submit_flags);
extern int cfa_madvise(void *addr, size_t length, int advice, __u64 submit_flags);
extern int cfa_openat(int dirfd, const char *pathname, int flags, mode_t mode, __u64 submit_flags);
#if defined(CFA_HAVE_OPENAT2)
        extern int cfa_openat2(int dirfd, const char *pathname, struct open_how * how, size_t size, __u64 submit_flags);
#endif
extern int cfa_close(int fd, __u64 submit_flags);
#if defined(CFA_HAVE_STATX)
        extern int cfa_statx(int dirfd, const char *pathname, int flags, unsigned int mask, struct statx *statxbuf, __u64 submit_flags);
#endif
extern ssize_t cfa_read(int fd, void * buf, size_t count, __u64 submit_flags);
extern ssize_t cfa_write(int fd, void * buf, size_t count, __u64 submit_flags);
extern ssize_t cfa_splice(int fd_in, __off64_t *off_in, int fd_out, __off64_t *off_out, size_t len, unsigned int flags, __u64 submit_flags);
extern ssize_t cfa_tee(int fd_in, int fd_out, size_t len, unsigned int flags, __u64 submit_flags);

//----------
// asynchronous calls
#if defined(CFA_HAVE_PREADV2)
        extern void async_preadv2(io_future_t & future, int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags, __u64 submit_flags);
#endif
#if defined(CFA_HAVE_PWRITEV2)
        extern void async_pwritev2(io_future_t & future, int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags, __u64 submit_flags);
#endif
extern void async_fsync(io_future_t & future, int fd, __u64 submit_flags);
extern void async_epoll_ctl(io_future_t & future, int epfd, int op, int fd, struct epoll_event *event, __u64 submit_flags);
extern void async_sync_file_range(io_future_t & future, int fd, off64_t offset, off64_t nbytes, unsigned int flags, __u64 submit_flags);
extern void async_sendmsg(io_future_t & future, int sockfd, const struct msghdr *msg, int flags, __u64 submit_flags);
extern void async_recvmsg(io_future_t & future, int sockfd, struct msghdr *msg, int flags, __u64 submit_flags);
extern void async_send(io_future_t & future, int sockfd, const void *buf, size_t len, int flags, __u64 submit_flags);
extern void async_recv(io_future_t & future, int sockfd, void *buf, size_t len, int flags, __u64 submit_flags);
extern void async_accept4(io_future_t & future, int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags, __u64 submit_flags);
extern void async_connect(io_future_t & future, int sockfd, const struct sockaddr *addr, socklen_t addrlen, __u64 submit_flags);
extern void async_fallocate(io_future_t & future, int fd, int mode, off_t offset, off_t len, __u64 submit_flags);
extern void async_posix_fadvise(io_future_t & future, int fd, off_t offset, off_t len, int advice, __u64 submit_flags);
extern void async_madvise(io_future_t & future, void *addr, size_t length, int advice, __u64 submit_flags);
extern void async_openat(io_future_t & future, int dirfd, const char *pathname, int flags, mode_t mode, __u64 submit_flags);
#if defined(CFA_HAVE_OPENAT2)
        extern void async_openat2(io_future_t & future, int dirfd, const char *pathname, struct open_how * how, size_t size, __u64 submit_flags);
#endif
extern void async_close(io_future_t & future, int fd, __u64 submit_flags);
#if defined(CFA_HAVE_STATX)
        extern void async_statx(io_future_t & future, int dirfd, const char *pathname, int flags, unsigned int mask, struct statx *statxbuf, __u64 submit_flags);
#endif
void async_read(io_future_t & future, int fd, void * buf, size_t count, __u64 submit_flags);
extern void async_write(io_future_t & future, int fd, void * buf, size_t count, __u64 submit_flags);
extern void async_splice(io_future_t & future, int fd_in, __off64_t *off_in, int fd_out, __off64_t *off_out, size_t len, unsigned int flags, __u64 submit_flags);
extern void async_tee(io_future_t & future, int fd_in, int fd_out, size_t len, unsigned int flags, __u64 submit_flags);


//-----------------------------------------------------------------------------
// Check if a function is blocks a only the user thread
bool has_user_level_blocking( fptr_t func );

#if CFA_HAVE_LINUX_IO_URING_H
        static inline void zero_sqe(struct io_uring_sqe * sqe) {
                sqe->flags = 0;
                sqe->ioprio = 0;
                sqe->fd = 0;
                sqe->off = 0;
                sqe->addr = 0;
                sqe->len = 0;
                sqe->fsync_flags = 0;
                sqe->__pad2[0] = 0;
                sqe->__pad2[1] = 0;
                sqe->__pad2[2] = 0;
                sqe->fd = 0;
                sqe->off = 0;
                sqe->addr = 0;
                sqe->len = 0;
        }
#endif