Memory allocation

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Detailed Description

Memory allocation and size_t arithmetics.

Defines
#define	MYMALLOC(target, type, count)
	Allocate count elements of type type and store the pointer to target.
#define	MYMALLOCZ(target, type, count, init)
	Allocate count elements of type type, initialise each element to init, and store the pointer to target.
#define	MYMALLOC2Z(target, type, count1, count2, init)   MYMALLOCZ(target, type, size_multiply(count1, count2), init)
	Allocate count1 times count2 elements of type type, initialise each element to init, and store the pointer to target.
Functions
static size_t	size_multiply (size_t a, size_t b)
	Multiply a by b; exit with failure if an overflow occurs.
static void *	mymalloc (size_t s)
	Allocate s bytes; exit with failure if out of memory.

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Define Documentation

#define MYMALLOC	(	target,
		type,
		count		)

Value:

do { \
        type *my_result = mymalloc(size_multiply(sizeof(type), count)); \
        target = my_result; \
    } while (0)

Allocate count elements of type type and store the pointer to target.

Definition at line 145 of file types.c.

Referenced by prepare_slots(), and process_input().

#define MYMALLOC2Z	(	target,
		type,
		count1,
		count2,
		init		)	MYMALLOCZ(target, type, size_multiply(count1, count2), init)

Allocate count1 times count2 elements of type type, initialise each element to init, and store the pointer to target.

Definition at line 163 of file types.c.

Referenced by calculate_statistics().

#define MYMALLOCZ	(	target,
		type,
		count,
		init		)

Value:

do { \
        size_t my_count = count; \
        type *my_result = mymalloc(size_multiply(sizeof(type), my_count)); \
        for (size_t my_i = 0; my_i < my_count; my_i++) { \
            my_result[my_i] = init; \
        } \
        target = my_result; \
    } while (0)

Allocate count elements of type type, initialise each element to init, and store the pointer to target.

Definition at line 152 of file types.c.

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Function Documentation

static void* mymalloc

(

size_t

s

)

[static]

Allocate s bytes; exit with failure if out of memory.

Definition at line 181 of file types.c.

static size_t size_multiply	(	size_t	a,
		size_t	b
	)			[static]

Multiply a by b; exit with failure if an overflow occurs.

Definition at line 168 of file types.c.

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