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tildefriends/deps/libuv/src/uv-common.h
Cory McWilliams ae0a8b0a33 libuv 1.46.0. 
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4336 ed5197a5-7fde-0310-b194-c3ffbd925b24
2023-07-04 00:24:48 +00:00

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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/*
* This file is private to libuv. It provides common functionality to both
* Windows and Unix backends.
*/
#ifndef UV_COMMON_H_
#define UV_COMMON_H_
#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include "uv.h"
#include "uv/tree.h"
#include "queue.h"
#include "strscpy.h"
#ifndef _MSC_VER
# include <stdatomic.h>
#endif
#if EDOM > 0
# define UV__ERR(x) (-(x))
#else
# define UV__ERR(x) (x)
#endif
#if !defined(snprintf) && defined(_MSC_VER) && _MSC_VER < 1900
extern int snprintf(char*, size_t, const char*, ...);
#endif
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define ARRAY_END(a) ((a) + ARRAY_SIZE(a))
#define container_of(ptr, type, member) \
((type *) ((char *) (ptr) - offsetof(type, member)))
/* C11 defines static_assert to be a macro which calls _Static_assert. */
#if defined(static_assert)
#define STATIC_ASSERT(expr) static_assert(expr, #expr)
#else
#define STATIC_ASSERT(expr) \
void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)])
#endif
#ifdef _MSC_VER
#define uv__exchange_int_relaxed(p, v) \
InterlockedExchangeNoFence((LONG volatile*)(p), v)
#else
#define uv__exchange_int_relaxed(p, v) \
atomic_exchange_explicit((_Atomic int*)(p), v, memory_order_relaxed)
#endif
#define UV__UDP_DGRAM_MAXSIZE (64 * 1024)
/* Handle flags. Some flags are specific to Windows or UNIX. */
enum {
/* Used by all handles. */
UV_HANDLE_CLOSING = 0x00000001,
UV_HANDLE_CLOSED = 0x00000002,
UV_HANDLE_ACTIVE = 0x00000004,
UV_HANDLE_REF = 0x00000008,
UV_HANDLE_INTERNAL = 0x00000010,
UV_HANDLE_ENDGAME_QUEUED = 0x00000020,
/* Used by streams. */
UV_HANDLE_LISTENING = 0x00000040,
UV_HANDLE_CONNECTION = 0x00000080,
UV_HANDLE_SHUT = 0x00000200,
UV_HANDLE_READ_PARTIAL = 0x00000400,
UV_HANDLE_READ_EOF = 0x00000800,
/* Used by streams and UDP handles. */
UV_HANDLE_READING = 0x00001000,
UV_HANDLE_BOUND = 0x00002000,
UV_HANDLE_READABLE = 0x00004000,
UV_HANDLE_WRITABLE = 0x00008000,
UV_HANDLE_READ_PENDING = 0x00010000,
UV_HANDLE_SYNC_BYPASS_IOCP = 0x00020000,
UV_HANDLE_ZERO_READ = 0x00040000,
UV_HANDLE_EMULATE_IOCP = 0x00080000,
UV_HANDLE_BLOCKING_WRITES = 0x00100000,
UV_HANDLE_CANCELLATION_PENDING = 0x00200000,
/* Used by uv_tcp_t and uv_udp_t handles */
UV_HANDLE_IPV6 = 0x00400000,
/* Only used by uv_tcp_t handles. */
UV_HANDLE_TCP_NODELAY = 0x01000000,
UV_HANDLE_TCP_KEEPALIVE = 0x02000000,
UV_HANDLE_TCP_SINGLE_ACCEPT = 0x04000000,
UV_HANDLE_TCP_ACCEPT_STATE_CHANGING = 0x08000000,
UV_HANDLE_SHARED_TCP_SOCKET = 0x10000000,
/* Only used by uv_udp_t handles. */
UV_HANDLE_UDP_PROCESSING = 0x01000000,
UV_HANDLE_UDP_CONNECTED = 0x02000000,
UV_HANDLE_UDP_RECVMMSG = 0x04000000,
/* Only used by uv_pipe_t handles. */
UV_HANDLE_NON_OVERLAPPED_PIPE = 0x01000000,
UV_HANDLE_PIPESERVER = 0x02000000,
/* Only used by uv_tty_t handles. */
UV_HANDLE_TTY_READABLE = 0x01000000,
UV_HANDLE_TTY_RAW = 0x02000000,
UV_HANDLE_TTY_SAVED_POSITION = 0x04000000,
UV_HANDLE_TTY_SAVED_ATTRIBUTES = 0x08000000,
/* Only used by uv_signal_t handles. */
UV_SIGNAL_ONE_SHOT_DISPATCHED = 0x01000000,
UV_SIGNAL_ONE_SHOT = 0x02000000,
/* Only used by uv_poll_t handles. */
UV_HANDLE_POLL_SLOW = 0x01000000,
/* Only used by uv_process_t handles. */
UV_HANDLE_REAP = 0x10000000
};
int uv__loop_configure(uv_loop_t* loop, uv_loop_option option, va_list ap);
void uv__loop_close(uv_loop_t* loop);
int uv__read_start(uv_stream_t* stream,
uv_alloc_cb alloc_cb,
uv_read_cb read_cb);
int uv__tcp_bind(uv_tcp_t* tcp,
const struct sockaddr* addr,
unsigned int addrlen,
unsigned int flags);
int uv__tcp_connect(uv_connect_t* req,
uv_tcp_t* handle,
const struct sockaddr* addr,
unsigned int addrlen,
uv_connect_cb cb);
int uv__udp_init_ex(uv_loop_t* loop,
uv_udp_t* handle,
unsigned flags,
int domain);
int uv__udp_bind(uv_udp_t* handle,
const struct sockaddr* addr,
unsigned int addrlen,
unsigned int flags);
int uv__udp_connect(uv_udp_t* handle,
const struct sockaddr* addr,
unsigned int addrlen);
int uv__udp_disconnect(uv_udp_t* handle);
int uv__udp_is_connected(uv_udp_t* handle);
int uv__udp_send(uv_udp_send_t* req,
uv_udp_t* handle,
const uv_buf_t bufs[],
unsigned int nbufs,
const struct sockaddr* addr,
unsigned int addrlen,
uv_udp_send_cb send_cb);
int uv__udp_try_send(uv_udp_t* handle,
const uv_buf_t bufs[],
unsigned int nbufs,
const struct sockaddr* addr,
unsigned int addrlen);
int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloccb,
uv_udp_recv_cb recv_cb);
int uv__udp_recv_stop(uv_udp_t* handle);
void uv__fs_poll_close(uv_fs_poll_t* handle);
int uv__getaddrinfo_translate_error(int sys_err); /* EAI_* error. */
enum uv__work_kind {
UV__WORK_CPU,
UV__WORK_FAST_IO,
UV__WORK_SLOW_IO
};
void uv__work_submit(uv_loop_t* loop,
struct uv__work *w,
enum uv__work_kind kind,
void (*work)(struct uv__work *w),
void (*done)(struct uv__work *w, int status));
void uv__work_done(uv_async_t* handle);
size_t uv__count_bufs(const uv_buf_t bufs[], unsigned int nbufs);
int uv__socket_sockopt(uv_handle_t* handle, int optname, int* value);
void uv__fs_scandir_cleanup(uv_fs_t* req);
void uv__fs_readdir_cleanup(uv_fs_t* req);
uv_dirent_type_t uv__fs_get_dirent_type(uv__dirent_t* dent);
int uv__next_timeout(const uv_loop_t* loop);
void uv__run_timers(uv_loop_t* loop);
void uv__timer_close(uv_timer_t* handle);
void uv__process_title_cleanup(void);
void uv__signal_cleanup(void);
void uv__threadpool_cleanup(void);
#define uv__has_active_reqs(loop) \
((loop)->active_reqs.count > 0)
#define uv__req_register(loop, req) \
do { \
(loop)->active_reqs.count++; \
} \
while (0)
#define uv__req_unregister(loop, req) \
do { \
assert(uv__has_active_reqs(loop)); \
(loop)->active_reqs.count--; \
} \
while (0)
#define uv__has_active_handles(loop) \
((loop)->active_handles > 0)
#define uv__active_handle_add(h) \
do { \
(h)->loop->active_handles++; \
} \
while (0)
#define uv__active_handle_rm(h) \
do { \
(h)->loop->active_handles--; \
} \
while (0)
#define uv__is_active(h) \
(((h)->flags & UV_HANDLE_ACTIVE) != 0)
#define uv__is_closing(h) \
(((h)->flags & (UV_HANDLE_CLOSING | UV_HANDLE_CLOSED)) != 0)
#if defined(_WIN32)
# define uv__is_stream_shutting(h) \
(h->stream.conn.shutdown_req != NULL)
#else
# define uv__is_stream_shutting(h) \
(h->shutdown_req != NULL)
#endif
#define uv__handle_start(h) \
do { \
if (((h)->flags & UV_HANDLE_ACTIVE) != 0) break; \
(h)->flags |= UV_HANDLE_ACTIVE; \
if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_add(h); \
} \
while (0)
#define uv__handle_stop(h) \
do { \
if (((h)->flags & UV_HANDLE_ACTIVE) == 0) break; \
(h)->flags &= ~UV_HANDLE_ACTIVE; \
if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_rm(h); \
} \
while (0)
#define uv__handle_ref(h) \
do { \
if (((h)->flags & UV_HANDLE_REF) != 0) break; \
(h)->flags |= UV_HANDLE_REF; \
if (((h)->flags & UV_HANDLE_CLOSING) != 0) break; \
if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_add(h); \
} \
while (0)
#define uv__handle_unref(h) \
do { \
if (((h)->flags & UV_HANDLE_REF) == 0) break; \
(h)->flags &= ~UV_HANDLE_REF; \
if (((h)->flags & UV_HANDLE_CLOSING) != 0) break; \
if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_rm(h); \
} \
while (0)
#define uv__has_ref(h) \
(((h)->flags & UV_HANDLE_REF) != 0)
#if defined(_WIN32)
# define uv__handle_platform_init(h) ((h)->u.fd = -1)
#else
# define uv__handle_platform_init(h) ((h)->next_closing = NULL)
#endif
#define uv__handle_init(loop_, h, type_) \
do { \
(h)->loop = (loop_); \
(h)->type = (type_); \
(h)->flags = UV_HANDLE_REF; /* Ref the loop when active. */ \
uv__queue_insert_tail(&(loop_)->handle_queue, &(h)->handle_queue); \
uv__handle_platform_init(h); \
} \
while (0)
/* Note: uses an open-coded version of SET_REQ_SUCCESS() because of
* a circular dependency between src/uv-common.h and src/win/internal.h.
*/
#if defined(_WIN32)
# define UV_REQ_INIT(req, typ) \
do { \
(req)->type = (typ); \
(req)->u.io.overlapped.Internal = 0; /* SET_REQ_SUCCESS() */ \
} \
while (0)
#else
# define UV_REQ_INIT(req, typ) \
do { \
(req)->type = (typ); \
} \
while (0)
#endif
#define uv__req_init(loop, req, typ) \
do { \
UV_REQ_INIT(req, typ); \
uv__req_register(loop, req); \
} \
while (0)
#define uv__get_internal_fields(loop) \
((uv__loop_internal_fields_t*) loop->internal_fields)
#define uv__get_loop_metrics(loop) \
(&uv__get_internal_fields(loop)->loop_metrics)
#define uv__metrics_inc_loop_count(loop) \
do { \
uv__get_loop_metrics(loop)->metrics.loop_count++; \
} while (0)
#define uv__metrics_inc_events(loop, e) \
do { \
uv__get_loop_metrics(loop)->metrics.events += (e); \
} while (0)
#define uv__metrics_inc_events_waiting(loop, e) \
do { \
uv__get_loop_metrics(loop)->metrics.events_waiting += (e); \
} while (0)
/* Allocator prototypes */
void *uv__calloc(size_t count, size_t size);
char *uv__strdup(const char* s);
char *uv__strndup(const char* s, size_t n);
void* uv__malloc(size_t size);
void uv__free(void* ptr);
void* uv__realloc(void* ptr, size_t size);
void* uv__reallocf(void* ptr, size_t size);
typedef struct uv__loop_metrics_s uv__loop_metrics_t;
typedef struct uv__loop_internal_fields_s uv__loop_internal_fields_t;
struct uv__loop_metrics_s {
uv_metrics_t metrics;
uint64_t provider_entry_time;
uint64_t provider_idle_time;
uv_mutex_t lock;
};
void uv__metrics_update_idle_time(uv_loop_t* loop);
void uv__metrics_set_provider_entry_time(uv_loop_t* loop);
#ifdef __linux__
struct uv__iou {
uint32_t* sqhead;
uint32_t* sqtail;
uint32_t* sqarray;
uint32_t sqmask;
uint32_t* sqflags;
uint32_t* cqhead;
uint32_t* cqtail;
uint32_t cqmask;
void* sq; /* pointer to munmap() on event loop teardown */
void* cqe; /* pointer to array of struct uv__io_uring_cqe */
void* sqe; /* pointer to array of struct uv__io_uring_sqe */
size_t sqlen;
size_t cqlen;
size_t maxlen;
size_t sqelen;
int ringfd;
uint32_t in_flight;
uint32_t flags;
};
#endif /* __linux__ */
struct uv__loop_internal_fields_s {
unsigned int flags;
uv__loop_metrics_t loop_metrics;
int current_timeout;
#ifdef __linux__
struct uv__iou ctl;
struct uv__iou iou;
void* inv; /* used by uv__platform_invalidate_fd() */
#endif /* __linux__ */
};
#endif /* UV_COMMON_H_ */
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