#pragma once
#include <atomic>
#include <cstdio>
#include <string>
#include <vector>
#ifdef LLAMA_SUBPROCESS
#include <sheredom/subprocess.h>
#else
// dummy values to allow compilation when subprocess is disabled
struct subprocess_s {};
static constexpr int subprocess_option_no_window = 0;
static constexpr int subprocess_option_combined_stdout_stderr = 0;
static constexpr int subprocess_option_inherit_environment = 0;
static constexpr int subprocess_option_search_user_path = 0;
#endif
// RAII-style wrapper around https://github.com/sheredom/subprocess.h,
// exposing method calls instead of free functions operating on subprocess_s.
struct common_subproc {
common_subproc() = default;
~common_subproc();
common_subproc(const common_subproc &) = delete;
common_subproc & operator=(const common_subproc &) = delete;
// spawn a child process; if env is non-empty it replaces the child's environment
// (do not combine with subprocess_option_inherit_environment)
bool create(
const std::vector<std::string> & args,
int options,
const std::vector<std::string> & env = {},
const char * cwd = nullptr);
bool alive();
// true if LLAMA_SUBPROCESS was enabled at build time; when false, create() always fails
static bool is_supported();
FILE * stdin_file();
FILE * stdout_file();
FILE * stderr_file();
// close stdin and detach it from the process, so a later join()/destroy() won't double-close it;
// use this after writing all input to signal EOF to the child while it's still running
void close_stdin();
void terminate();
// wait for the process to exit, release the underlying handle and return its exit code
int join();
private:
subprocess_s proc {};
std::atomic<bool> is_created{false};
bool has_handle() const;
};