--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/include/uv/unix.h	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,512 @@
+/* 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.
+ */
+
+#ifndef UV_UNIX_H
+#define UV_UNIX_H
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>  /* MAXHOSTNAMELEN on Solaris */
+
+#include <termios.h>
+#include <pwd.h>
+
+#if !defined(__MVS__)
+#include <semaphore.h>
+#include <sys/param.h> /* MAXHOSTNAMELEN on Linux and the BSDs */
+#endif
+#include <pthread.h>
+#include <signal.h>
+
+#include "uv/threadpool.h"
+
+#if defined(__linux__)
+# include "uv/linux.h"
+#elif defined (__MVS__)
+# include "uv/os390.h"
+#elif defined(__PASE__)  /* __PASE__ and _AIX are both defined on IBM i */
+# include "uv/posix.h"  /* IBM i needs uv/posix.h, not uv/aix.h */
+#elif defined(_AIX)
+# include "uv/aix.h"
+#elif defined(__sun)
+# include "uv/sunos.h"
+#elif defined(__APPLE__)
+# include "uv/darwin.h"
+#elif defined(__DragonFly__)       || \
+      defined(__FreeBSD__)         || \
+      defined(__OpenBSD__)         || \
+      defined(__NetBSD__)
+# include "uv/bsd.h"
+#elif defined(__CYGWIN__) || \
+      defined(__MSYS__)   || \
+      defined(__HAIKU__)  || \
+      defined(__QNX__)    || \
+      defined(__GNU__)
+# include "uv/posix.h"
+#endif
+
+#ifndef NI_MAXHOST
+# define NI_MAXHOST 1025
+#endif
+
+#ifndef NI_MAXSERV
+# define NI_MAXSERV 32
+#endif
+
+#ifndef UV_IO_PRIVATE_PLATFORM_FIELDS
+# define UV_IO_PRIVATE_PLATFORM_FIELDS /* empty */
+#endif
+
+struct uv__io_s;
+struct uv_loop_s;
+
+typedef void (*uv__io_cb)(struct uv_loop_s* loop,
+                          struct uv__io_s* w,
+                          unsigned int events);
+typedef struct uv__io_s uv__io_t;
+
+struct uv__io_s {
+  uv__io_cb cb;
+  struct uv__queue pending_queue;
+  struct uv__queue watcher_queue;
+  unsigned int pevents; /* Pending event mask i.e. mask at next tick. */
+  unsigned int events;  /* Current event mask. */
+  int fd;
+  UV_IO_PRIVATE_PLATFORM_FIELDS
+};
+
+#ifndef UV_PLATFORM_SEM_T
+# define UV_PLATFORM_SEM_T sem_t
+#endif
+
+#ifndef UV_PLATFORM_LOOP_FIELDS
+# define UV_PLATFORM_LOOP_FIELDS /* empty */
+#endif
+
+#ifndef UV_PLATFORM_FS_EVENT_FIELDS
+# define UV_PLATFORM_FS_EVENT_FIELDS /* empty */
+#endif
+
+#ifndef UV_STREAM_PRIVATE_PLATFORM_FIELDS
+# define UV_STREAM_PRIVATE_PLATFORM_FIELDS /* empty */
+#endif
+
+/* Note: May be cast to struct iovec. See writev(2). */
+typedef struct uv_buf_t {
+  char* base;
+  size_t len;
+} uv_buf_t;
+
+typedef int uv_file;
+typedef int uv_os_sock_t;
+typedef int uv_os_fd_t;
+typedef pid_t uv_pid_t;
+
+#define UV_ONCE_INIT PTHREAD_ONCE_INIT
+
+typedef pthread_once_t uv_once_t;
+typedef pthread_t uv_thread_t;
+typedef pthread_mutex_t uv_mutex_t;
+typedef pthread_rwlock_t uv_rwlock_t;
+typedef UV_PLATFORM_SEM_T uv_sem_t;
+typedef pthread_cond_t uv_cond_t;
+typedef pthread_key_t uv_key_t;
+
+/* Note: guard clauses should match uv_barrier_init's in src/unix/thread.c. */
+#if defined(_AIX) || \
+    defined(__OpenBSD__) || \
+    !defined(PTHREAD_BARRIER_SERIAL_THREAD)
+/* TODO(bnoordhuis) Merge into uv_barrier_t in v2. */
+struct _uv_barrier {
+  uv_mutex_t mutex;
+  uv_cond_t cond;
+  unsigned threshold;
+  unsigned in;
+  unsigned out;
+};
+
+typedef struct {
+  struct _uv_barrier* b;
+# if defined(PTHREAD_BARRIER_SERIAL_THREAD)
+  /* TODO(bnoordhuis) Remove padding in v2. */
+  char pad[sizeof(pthread_barrier_t) - sizeof(struct _uv_barrier*)];
+# endif
+} uv_barrier_t;
+#else
+typedef pthread_barrier_t uv_barrier_t;
+#endif
+
+/* Platform-specific definitions for uv_spawn support. */
+typedef gid_t uv_gid_t;
+typedef uid_t uv_uid_t;
+
+typedef struct dirent uv__dirent_t;
+
+#define UV_DIR_PRIVATE_FIELDS \
+  DIR* dir;
+
+#if defined(DT_UNKNOWN)
+# define HAVE_DIRENT_TYPES
+# if defined(DT_REG)
+#  define UV__DT_FILE DT_REG
+# else
+#  define UV__DT_FILE -1
+# endif
+# if defined(DT_DIR)
+#  define UV__DT_DIR DT_DIR
+# else
+#  define UV__DT_DIR -2
+# endif
+# if defined(DT_LNK)
+#  define UV__DT_LINK DT_LNK
+# else
+#  define UV__DT_LINK -3
+# endif
+# if defined(DT_FIFO)
+#  define UV__DT_FIFO DT_FIFO
+# else
+#  define UV__DT_FIFO -4
+# endif
+# if defined(DT_SOCK)
+#  define UV__DT_SOCKET DT_SOCK
+# else
+#  define UV__DT_SOCKET -5
+# endif
+# if defined(DT_CHR)
+#  define UV__DT_CHAR DT_CHR
+# else
+#  define UV__DT_CHAR -6
+# endif
+# if defined(DT_BLK)
+#  define UV__DT_BLOCK DT_BLK
+# else
+#  define UV__DT_BLOCK -7
+# endif
+#endif
+
+/* Platform-specific definitions for uv_dlopen support. */
+#define UV_DYNAMIC /* empty */
+
+typedef struct {
+  void* handle;
+  char* errmsg;
+} uv_lib_t;
+
+#define UV_LOOP_PRIVATE_FIELDS                                                \
+  unsigned long flags;                                                        \
+  int backend_fd;                                                             \
+  struct uv__queue pending_queue;                                             \
+  struct uv__queue watcher_queue;                                             \
+  uv__io_t** watchers;                                                        \
+  unsigned int nwatchers;                                                     \
+  unsigned int nfds;                                                          \
+  struct uv__queue wq;                                                        \
+  uv_mutex_t wq_mutex;                                                        \
+  uv_async_t wq_async;                                                        \
+  uv_rwlock_t cloexec_lock;                                                   \
+  uv_handle_t* closing_handles;                                               \
+  struct uv__queue process_handles;                                           \
+  struct uv__queue prepare_handles;                                           \
+  struct uv__queue check_handles;                                             \
+  struct uv__queue idle_handles;                                              \
+  struct uv__queue async_handles;                                             \
+  void (*async_unused)(void);  /* TODO(bnoordhuis) Remove in libuv v2. */     \
+  uv__io_t async_io_watcher;                                                  \
+  int async_wfd;                                                              \
+  struct {                                                                    \
+    void* min;                                                                \
+    unsigned int nelts;                                                       \
+  } timer_heap;                                                               \
+  uint64_t timer_counter;                                                     \
+  uint64_t time;                                                              \
+  int signal_pipefd[2];                                                       \
+  uv__io_t signal_io_watcher;                                                 \
+  uv_signal_t child_watcher;                                                  \
+  int emfile_fd;                                                              \
+  UV_PLATFORM_LOOP_FIELDS                                                     \
+
+#define UV_REQ_TYPE_PRIVATE /* empty */
+
+#define UV_REQ_PRIVATE_FIELDS  /* empty */
+
+#define UV_PRIVATE_REQ_TYPES /* empty */
+
+#define UV_WRITE_PRIVATE_FIELDS                                               \
+  struct uv__queue queue;                                                     \
+  unsigned int write_index;                                                   \
+  uv_buf_t* bufs;                                                             \
+  unsigned int nbufs;                                                         \
+  int error;                                                                  \
+  uv_buf_t bufsml[4];                                                         \
+
+#define UV_CONNECT_PRIVATE_FIELDS                                             \
+  struct uv__queue queue;                                                     \
+
+#define UV_SHUTDOWN_PRIVATE_FIELDS /* empty */
+
+#define UV_UDP_SEND_PRIVATE_FIELDS                                            \
+  struct uv__queue queue;                                                     \
+  union {                                                                     \
+    struct sockaddr addr;                                                     \
+    struct sockaddr_storage storage;                                          \
+  } u;                                                                        \
+  unsigned int nbufs;                                                         \
+  uv_buf_t* bufs;                                                             \
+  ssize_t status;                                                             \
+  uv_udp_send_cb send_cb;                                                     \
+  uv_buf_t bufsml[4];                                                         \
+
+#define UV_HANDLE_PRIVATE_FIELDS                                              \
+  uv_handle_t* next_closing;                                                  \
+  unsigned int flags;                                                         \
+
+#define UV_STREAM_PRIVATE_FIELDS                                              \
+  uv_connect_t *connect_req;                                                  \
+  uv_shutdown_t *shutdown_req;                                                \
+  uv__io_t io_watcher;                                                        \
+  struct uv__queue write_queue;                                               \
+  struct uv__queue write_completed_queue;                                     \
+  uv_connection_cb connection_cb;                                             \
+  int delayed_error;                                                          \
+  int accepted_fd;                                                            \
+  void* queued_fds;                                                           \
+  UV_STREAM_PRIVATE_PLATFORM_FIELDS                                           \
+
+#define UV_TCP_PRIVATE_FIELDS /* empty */
+
+#define UV_UDP_PRIVATE_FIELDS                                                 \
+  uv_alloc_cb alloc_cb;                                                       \
+  uv_udp_recv_cb recv_cb;                                                     \
+  uv__io_t io_watcher;                                                        \
+  struct uv__queue write_queue;                                               \
+  struct uv__queue write_completed_queue;                                     \
+
+#define UV_PIPE_PRIVATE_FIELDS                                                \
+  const char* pipe_fname; /* NULL or strdup'ed */
+
+#define UV_POLL_PRIVATE_FIELDS                                                \
+  uv__io_t io_watcher;
+
+#define UV_PREPARE_PRIVATE_FIELDS                                             \
+  uv_prepare_cb prepare_cb;                                                   \
+  struct uv__queue queue;                                                     \
+
+#define UV_CHECK_PRIVATE_FIELDS                                               \
+  uv_check_cb check_cb;                                                       \
+  struct uv__queue queue;                                                     \
+
+#define UV_IDLE_PRIVATE_FIELDS                                                \
+  uv_idle_cb idle_cb;                                                         \
+  struct uv__queue queue;                                                     \
+
+#define UV_ASYNC_PRIVATE_FIELDS                                               \
+  uv_async_cb async_cb;                                                       \
+  struct uv__queue queue;                                                     \
+  int pending;                                                                \
+
+#define UV_TIMER_PRIVATE_FIELDS                                               \
+  uv_timer_cb timer_cb;                                                       \
+  union {                                                                     \
+    void* heap[3];                                                            \
+    struct uv__queue queue;                                                   \
+  } node;                                                                     \
+  uint64_t timeout;                                                           \
+  uint64_t repeat;                                                            \
+  uint64_t start_id;
+
+#define UV_GETADDRINFO_PRIVATE_FIELDS                                         \
+  struct uv__work work_req;                                                   \
+  uv_getaddrinfo_cb cb;                                                       \
+  struct addrinfo* hints;                                                     \
+  char* hostname;                                                             \
+  char* service;                                                              \
+  struct addrinfo* addrinfo;                                                  \
+  int retcode;
+
+#define UV_GETNAMEINFO_PRIVATE_FIELDS                                         \
+  struct uv__work work_req;                                                   \
+  uv_getnameinfo_cb getnameinfo_cb;                                           \
+  struct sockaddr_storage storage;                                            \
+  int flags;                                                                  \
+  char host[NI_MAXHOST];                                                      \
+  char service[NI_MAXSERV];                                                   \
+  int retcode;
+
+#define UV_PROCESS_PRIVATE_FIELDS                                             \
+  struct uv__queue queue;                                                     \
+  int status;                                                                 \
+
+#define UV_FS_PRIVATE_FIELDS                                                  \
+  const char *new_path;                                                       \
+  uv_file file;                                                               \
+  int flags;                                                                  \
+  mode_t mode;                                                                \
+  unsigned int nbufs;                                                         \
+  uv_buf_t* bufs;                                                             \
+  off_t off;                                                                  \
+  uv_uid_t uid;                                                               \
+  uv_gid_t gid;                                                               \
+  double atime;                                                               \
+  double mtime;                                                               \
+  struct uv__work work_req;                                                   \
+  uv_buf_t bufsml[4];                                                         \
+
+#define UV_WORK_PRIVATE_FIELDS                                                \
+  struct uv__work work_req;
+
+#define UV_TTY_PRIVATE_FIELDS                                                 \
+  struct termios orig_termios;                                                \
+  int mode;
+
+#define UV_SIGNAL_PRIVATE_FIELDS                                              \
+  /* RB_ENTRY(uv_signal_s) tree_entry; */                                     \
+  struct {                                                                    \
+    struct uv_signal_s* rbe_left;                                             \
+    struct uv_signal_s* rbe_right;                                            \
+    struct uv_signal_s* rbe_parent;                                           \
+    int rbe_color;                                                            \
+  } tree_entry;                                                               \
+  /* Use two counters here so we don have to fiddle with atomics. */          \
+  unsigned int caught_signals;                                                \
+  unsigned int dispatched_signals;
+
+#define UV_FS_EVENT_PRIVATE_FIELDS                                            \
+  uv_fs_event_cb cb;                                                          \
+  UV_PLATFORM_FS_EVENT_FIELDS                                                 \
+
+/* fs open() flags supported on this platform: */
+#if defined(O_APPEND)
+# define UV_FS_O_APPEND       O_APPEND
+#else
+# define UV_FS_O_APPEND       0
+#endif
+#if defined(O_CREAT)
+# define UV_FS_O_CREAT        O_CREAT
+#else
+# define UV_FS_O_CREAT        0
+#endif
+
+#if defined(__linux__) && defined(__arm__)
+# define UV_FS_O_DIRECT       0x10000
+#elif defined(__linux__) && defined(__m68k__)
+# define UV_FS_O_DIRECT       0x10000
+#elif defined(__linux__) && defined(__mips__)
+# define UV_FS_O_DIRECT       0x08000
+#elif defined(__linux__) && defined(__powerpc__)
+# define UV_FS_O_DIRECT       0x20000
+#elif defined(__linux__) && defined(__s390x__)
+# define UV_FS_O_DIRECT       0x04000
+#elif defined(__linux__) && defined(__x86_64__)
+# define UV_FS_O_DIRECT       0x04000
+#elif defined(__linux__) && defined(__loongarch__)
+# define UV_FS_O_DIRECT       0x04000
+#elif defined(O_DIRECT)
+# define UV_FS_O_DIRECT       O_DIRECT
+#else
+# define UV_FS_O_DIRECT       0
+#endif
+
+#if defined(O_DIRECTORY)
+# define UV_FS_O_DIRECTORY    O_DIRECTORY
+#else
+# define UV_FS_O_DIRECTORY    0
+#endif
+#if defined(O_DSYNC)
+# define UV_FS_O_DSYNC        O_DSYNC
+#else
+# define UV_FS_O_DSYNC        0
+#endif
+#if defined(O_EXCL)
+# define UV_FS_O_EXCL         O_EXCL
+#else
+# define UV_FS_O_EXCL         0
+#endif
+#if defined(O_EXLOCK)
+# define UV_FS_O_EXLOCK       O_EXLOCK
+#else
+# define UV_FS_O_EXLOCK       0
+#endif
+#if defined(O_NOATIME)
+# define UV_FS_O_NOATIME      O_NOATIME
+#else
+# define UV_FS_O_NOATIME      0
+#endif
+#if defined(O_NOCTTY)
+# define UV_FS_O_NOCTTY       O_NOCTTY
+#else
+# define UV_FS_O_NOCTTY       0
+#endif
+#if defined(O_NOFOLLOW)
+# define UV_FS_O_NOFOLLOW     O_NOFOLLOW
+#else
+# define UV_FS_O_NOFOLLOW     0
+#endif
+#if defined(O_NONBLOCK)
+# define UV_FS_O_NONBLOCK     O_NONBLOCK
+#else
+# define UV_FS_O_NONBLOCK     0
+#endif
+#if defined(O_RDONLY)
+# define UV_FS_O_RDONLY       O_RDONLY
+#else
+# define UV_FS_O_RDONLY       0
+#endif
+#if defined(O_RDWR)
+# define UV_FS_O_RDWR         O_RDWR
+#else
+# define UV_FS_O_RDWR         0
+#endif
+#if defined(O_SYMLINK)
+# define UV_FS_O_SYMLINK      O_SYMLINK
+#else
+# define UV_FS_O_SYMLINK      0
+#endif
+#if defined(O_SYNC)
+# define UV_FS_O_SYNC         O_SYNC
+#else
+# define UV_FS_O_SYNC         0
+#endif
+#if defined(O_TRUNC)
+# define UV_FS_O_TRUNC        O_TRUNC
+#else
+# define UV_FS_O_TRUNC        0
+#endif
+#if defined(O_WRONLY)
+# define UV_FS_O_WRONLY       O_WRONLY
+#else
+# define UV_FS_O_WRONLY       0
+#endif
+
+/* fs open() flags supported on other platforms: */
+#define UV_FS_O_FILEMAP       0
+#define UV_FS_O_RANDOM        0
+#define UV_FS_O_SHORT_LIVED   0
+#define UV_FS_O_SEQUENTIAL    0
+#define UV_FS_O_TEMPORARY     0
+
+#endif /* UV_UNIX_H */