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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author foxglove
* 2025-09-15 foxglove 1.0 version
* 2025-09-23 foxglove 1.1 version, add libdl bindings
*/
/*! C standard library API bindings
Provides Rust wrappers for standard C library functions
*/
#![allow(non_camel_case_types)]
pub use core::ffi::{c_char, c_int, c_void, c_long, c_ulong};
pub const RTLD_LAZY: c_int = 0x00000; /* Lazy function call binding */
pub const RTLD_NOW: c_int = 0x00001; /* Immediate function call binding */
pub const RTLD_GLOBAL: c_int = 0x10000; /* Make symbols globally available */
pub const RTLD_LOCAL: c_int = 0x00000; /* Default local */
pub const O_RDONLY: c_int = 0x0000; /* open for reading only */
pub const O_WRONLY: c_int = 0x0001; /* open for writing only */
pub const O_RDWR: c_int = 0x0002; /* open for reading and writing */
pub const O_APPEND: c_int = 0x0008; /* writes done at eof */
pub const O_CREAT: c_int = 0x0100; /* create and open file */
pub const O_TRUNC: c_int = 0x0200; /* open and truncate */
pub const O_EXCL: c_int = 0x0400; /* open only if file doesn't already exist */
pub type size_t = c_ulong;
pub type ssize_t = c_long;
pub type off_t = c_long;
pub const SEEK_SET: c_int = 0;
pub const SEEK_CUR: c_int = 1;
pub const SEEK_END: c_int = 2;
/* ============== time functions ============== */
pub type time_t = c_long;
pub type suseconds_t = c_int;
#[repr(C)]
pub struct timeval {
pub tv_sec: time_t,
pub tv_usec: suseconds_t,
}
/* ============== libdl functions ============== */
unsafe extern "C" {
pub fn dlopen(filename: *const c_char, flag: c_int) -> *mut c_void;
pub fn dlsym(handle: *mut c_void, symbol: *const c_char) -> *mut c_void;
pub fn dlclose(handle: *mut c_void) -> c_int;
pub fn dlerror() -> *const c_char;
}
unsafe extern "C" {
pub fn open(path: *const c_char, oflag: c_int, ...) -> c_int;
pub fn close(fd: c_int) -> c_int;
pub fn read(fd: c_int, buf: *mut c_void, count: size_t) -> ssize_t;
pub fn write(fd: c_int, buf: *const c_void, count: size_t) -> ssize_t;
pub fn lseek(fd: c_int, offset: off_t, whence: c_int) -> off_t;
pub fn fsync(fd: c_int) -> c_int;
pub fn ftruncate(fd: c_int, length: off_t) -> c_int;
}
/* ============== time functions ============== */
unsafe extern "C" {
/* Use local types instead of crate-root paths to avoid E0412 */
pub fn gettimeofday(tp: *mut timeval, tz: *mut c_void) -> c_int;
}
/* Helper: get last libdl error C-string pointer
* Safe wrapper around `dlerror()` returning the raw pointer for printing.
*/
#[inline]
pub fn last_error_ptr() -> *const c_char {
unsafe { dlerror() }
}
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