path: root/src/common/lock.c

#include <unistd.h>
#include <stdio.h>
#include "lock.h"
#include "socket.h"

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// �i�������݂��I���܂ŁA���t�@�C����ۊǂ��Ă����j

// �V�����t�@�C���̏������݊J�n
FILE* lock_fopen(const char* filename,int *info) {
	char newfile[512];
	FILE *fp;
	int  no = getpid();

	// ���S�ȃt�@�C�����𓾂�i�蔲���j
	do {
		sprintf(newfile,"%s_%d.tmp",filename,no++);
	} while((fp = fopen_(newfile,"r")) && fclose_(fp));
	*info = --no;
	return fopen_(newfile,"w");
}

// ���t�@�C�����폜���V�t�@�C�������l�[��
int lock_fclose(FILE *fp,const char* filename,int *info) {
	int  ret = 0;
	char newfile[512];
	if(fp != NULL) {
		ret = fclose_(fp);
		sprintf(newfile,"%s_%d.tmp",filename,*info);
		remove(filename);
		// ���̃^�C�~���O�ŗ�����ƍň��B
		rename(newfile,filename);
		return ret;
	} else {
		return 1;
	}
}