stdlib.h File Reference

Interface: reduced standard C library. More...

#include <mem.h>

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Functions
void *	calloc (size_t nmemb, size_t size)
	allocate and return pointer to initialized memory
void *	malloc (size_t size)
	allocate and return pointer to uninitialized memory
void	free (void *ptr)
	return the allocated memory to memory management.
long int	random (void)
	generate a random number
void	srandom (unsigned int seed)
	seed the random number generator

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Detailed Description

Interface: reduced standard C library.

This file describes the public programming interface for memory management services and random number services

Author:

Markus L. Noga <markus@noga.de>

Definition in file stdlib.h.

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Function Documentation

void* calloc (  size_t  nmemb, size_t  size )

allocate and return pointer to initialized memory calloc() allocates memory for an array of {nmemb} elements of {size} bytes each and returns a pointer to the allocated memory. The memory is filled with zero values. Parameters: nmemb  the number of members to allocate size  the size (in bytes) of each member to be allocated Returns: a pointer to the allocated memory (or NULL if failed) NOTE: content of the returned memory is initialized by this routine Referenced by image_load().

void free (  void *  ptr  )

return the allocated memory to memory management. free() frees the memory space pointed to by {ptr}, which must have been returned by a previous call to malloc(), or calloc(). Other- wise, or if free(ptr) has already been called before, undefined behaviour occurs. If ptr is NULL, no operation is performed. Parameters: ptr  a pointer to previously allocated memory Returns: Nothing Referenced by __builtin_delete().

void* malloc (  size_t  size  )

allocate and return pointer to uninitialized memory malloc() allocates {size} bytes of memory and returns a pointer to it. Parameters: size  the number of bytes of memory to be allocated Returns: a pointer to the allocated memory (or NULL if failed) NOTE: content of the returned memory is not initialized by this routine Referenced by __builtin_new(), lx_from_images(), and lx_read().

long int random (  void   )

generate a random number The random() function returns successive pseudo-random numbers Returns: a random number in the range from 0 to RAND_MAX Definition at line 77 of file random.c. References prandom_t::entry, generator, PRANDOM_SLOTS, randstep(), prandom_t::select, and prandom_t::state.

void srandom (  unsigned int  seed  )

seed the random number generator The srandom() function sets its argument as the seed for a new sequence of pseudo-random integers to be returned by random(). These sequences are repeatable by calling srandom() with the same seed value. If no seed value is provided, the random() function is automatically seeded with a value of 1. Parameters: seed  Returns: Nothing

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