qcount.c File Reference

Counter file handling APIs. More...

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Functions
int64_t	qcount_read (const char *filepath)
	Read counter(integer) from file with advisory file locking.
bool	qcount_save (const char *filepath, int64_t number)
	Save counter(integer) to file with advisory file locking.
int64_t	qcount_update (const char *filepath, int64_t number)
	Increases(or decrease) the counter value as much as specified number with advisory file locking.

Detailed Description

Counter file handling APIs.

Definition in file qcount.c.

Function Documentation

qcount_read()

int64_t qcount_read

(

const char *

filepath

)

Read counter(integer) from file with advisory file locking.

Parameters

filepath

file path

Returns

counter value readed from file. in case of failure, returns 0.

qcount_save("number.dat", 75);
int count = qcount_read("number.dat");

---- number.dat ----
75
--------------------

Definition at line 65 of file qcount.c.

qcount_save()

bool qcount_save	(	const char *	filepath,
		int64_t	number
	)

Save counter(integer) to file with advisory file locking.

Parameters

filepath	file path
number	counter integer value

Returns

true if successful, otherwise returns false.

qcount_save("number.dat", 75);

Definition at line 95 of file qcount.c.

qcount_update()

int64_t qcount_update	(	const char *	filepath,
		int64_t	number
	)

Increases(or decrease) the counter value as much as specified number with advisory file locking.

Parameters

filepath	file path
number	how much increase or decrease

Returns

updated counter value. in case of failure, returns 0.

int count;
count = qcount_update("number.dat", -3);

Definition at line 124 of file qcount.c.