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calloc()

Allocate space for an array

Synopsis:

#include <stdlib.h>

void* calloc ( size_t n, 
               size_t size );

Arguments:

n

The number of array elements to allocate.

size

The size, in bytes, of one array element.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The calloc() function allocates space from the heap for an array of n objects, each of size bytes, and initializes them to 0.

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A block of memory allocated with the calloc() function should be freed using the free() function.

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Returns:

A pointer to the start of the allocated memory, or NULL if an error occurred (errno is set).

Errors:

ENOMEM

Not enough memory.

EOK

No error.

Examples:

#include <stdlib.h>
#include <stdio.h>

int main( void )
{
    char* buffer;

    buffer = (char* )calloc( 80, sizeof(char) );
    if( buffer == NULL ) {
        printf( "Can't allocate memory for buffer!\n" );
        return EXIT_FAILURE;
    }

    free( buffer );

    return EXIT_SUCCESS;
}

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	No
Thread	Yes

See also:

free(), malloc(), realloc(), sbrk()

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