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// note: this file gets included in both kernel and userland
#pragma once
#include <stddef.h>
typedef int fd_t;
typedef int fs_handle_t;
enum {
// idc about stable syscall numbers just yet
_SYSCALL_EXIT,
_SYSCALL_AWAIT,
_SYSCALL_FORK,
_SYSCALL_FS_OPEN,
_SYSCALL_MOUNT,
_SYSCALL_FD_READ,
_SYSCALL_FD_WRITE,
_SYSCALL_FD_CLOSE,
_SYSCALL_DEBUGLOG
};
/** Kills the current process.
* TODO: what happens to the children?
*/
_Noreturn void _syscall_exit(const char *msg, size_t len);
/** Waits for a child to exit, putting its exit message into *buf.
* @return the length of the message
*/
int _syscall_await(char *buf, int len);
/** Creates a copy of the current process, and executes it.
* All user memory pages get copied too.
* @return 0 in the child, a meaningless positive value in the parent.
*/
int _syscall_fork();
fd_t _syscall_fs_open(const char *path, int len);
int _syscall_mount(const char *path, int len, fd_t fd);
int _syscall_fd_read(fd_t fd, char *buf, int len);
int _syscall_fd_write(fd_t fd, char *buf, int len);
int _syscall_fd_close(fd_t fd);
/** Prints a message to the debug console.
* @return the amount of bytes written (can be less than len)
*/
int _syscall_debuglog(const char *msg, size_t len);
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