nativelibc/process/child-table.c

/*	A part of the Native C Library for Windows NT
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
*/

#include <process.h>
#include <windows.h>
#include <nt.h>
#include <errno.h>

struct child {
	//int vaild;
	pid_t pid;
	void *handle;
};

static struct child child_table[64];

int __child_process_table_add(pid_t pid, void *handle) {
	int i = 0;
	while(child_table[i].pid > 0) {
		if(++i == 64) {
			errno = EAGAIN;
			return -1;
		}
	}
	//child_table[i].vaild = 1;
	child_table[i].pid = pid;
	child_table[i].handle = handle;
	return 0;
}

int __child_process_table_search_handle(pid_t pid, void **handle) {
	int i;
	for(i=0; i<64; i++) {
		if(child_table[i].pid == pid) {
			*handle = child_table[i].handle;
			return i;
		}
	}
	return -1;
}

// Caller should close the handle later
int __child_process_table_search_handle_and_clean(pid_t pid, void **handle) {
	int i = __child_process_table_search_handle(pid, handle);
	if(i < 0) return -1;
	child_table[i].pid = -1;
	child_table[i].handle = (void *)-1;
	return i;
}