#pragma once
// posix.h - POSIX type and constant definitions for posix.dll
// Covers just what open/read/write/close/lseek/spawn/pthread/chdir need.

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

// ---------------------------------------------------------------------------
// errno
// ---------------------------------------------------------------------------
#ifdef errno
#undef errno
#endif
#ifdef EAGAIN
#undef EAGAIN
#endif
#ifdef ENOSYS
#undef ENOSYS
#endif
extern int errno;   // defined in posix_fd.c; single global in v1

#define EPERM    1
#define ENOENT   2
#define ESRCH    3
#define EINTR    4
#define EIO      5
#define EBADF    9
#define ENOMEM  12
#define EACCES  13
#define EEXIST  17
#define ENODEV  19
#define ENOTDIR 20
#define EINVAL  22
#define EMFILE  24
#define ENOSPC  28
#define ERANGE  34
#define EAGAIN  35
#define ENOSYS  38

// ---------------------------------------------------------------------------
// open() flags
// ---------------------------------------------------------------------------
#define O_RDONLY    0x0000
#define O_WRONLY    0x0001
#define O_RDWR      0x0002
#define O_CREAT     0x0040
#define O_TRUNC     0x0200
#define O_APPEND    0x0400

// ---------------------------------------------------------------------------
// lseek() whence
// ---------------------------------------------------------------------------
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2

// ---------------------------------------------------------------------------
// Scalar types
// ---------------------------------------------------------------------------
typedef int32_t  pid_t;
typedef int32_t  off_t;
typedef uint32_t mode_t;
typedef int64_t ssize_t;

// ---------------------------------------------------------------------------
// pthread types
// ---------------------------------------------------------------------------
typedef struct { uint32_t Tid; }     pthread_t;
typedef struct { uint32_t Handle; }  pthread_mutex_t;
typedef void*                        pthread_attr_t;     // unused in v1
typedef void*                        pthread_mutexattr_t;

// ---------------------------------------------------------------------------
// posix_spawn types  (file_actions and attrp both ignored in v1)
// ---------------------------------------------------------------------------
typedef void* posix_spawn_file_actions_t;
typedef void* posix_spawnattr_t;

// ---------------------------------------------------------------------------
// dirent  (used by posix_dir.c)
// ---------------------------------------------------------------------------
#define NAME_MAX 259

typedef struct dirent {
    char d_name[NAME_MAX + 1];
    unsigned char d_type;    // DT_REG or DT_DIR
} dirent;

#define DT_UNKNOWN 0
#define DT_REG     8
#define DT_DIR     4

typedef struct DIR {
    uint32_t KHandle;        // kernel DIR_OBJECT handle
    dirent   Current;
    bool     Valid;
} DIR;