random-getentropy.c File Reference

#include "uv.h"
#include "internal.h"
#include <stddef.h>
#include <dlfcn.h>

Go to the source code of this file.

Typedefs
typedef int(*	uv__getentropy_cb) (void *, size_t)

Functions
static void	uv__random_getentropy_init (void)
int	uv__random_getentropy (void *buf, size_t buflen)

Variables
static uv__getentropy_cb	uv__getentropy
static uv_once_t	once = UV_ONCE_INIT

Typedef Documentation

uv__getentropy_cb

typedef int(* uv__getentropy_cb) (void *, size_t)

Definition at line 28 of file random-getentropy.c.

Function Documentation

uv__random_getentropy()

int uv__random_getentropy	(	void *	buf,
		size_t	buflen
	)

Definition at line 39 of file random-getentropy.c.

                                                    {
  size_t pos;
  size_t stride;
 
  uv_once(&once, uv__random_getentropy_init);
 
  if (uv__getentropy == NULL)
    return UV_ENOSYS;
 
  /* getentropy() returns an error for requests > 256 bytes. */
  for (pos = 0, stride = 256; pos + stride < buflen; pos += stride)
    if (uv__getentropy((char *) buf + pos, stride))
      return UV__ERR(errno);
 
  if (uv__getentropy((char *) buf + pos, buflen - pos))
    return UV__ERR(errno);
 
  return 0;
}

References buflen, NULL, once, pos, UV__ERR, uv__getentropy, uv__random_getentropy_init(), and uv_once().

Referenced by uv__random().

uv__random_getentropy_init()

static void uv__random_getentropy_init ( void  )

static

Definition at line 34 of file random-getentropy.c.

                                             {
  uv__getentropy = (uv__getentropy_cb) dlsym(RTLD_DEFAULT, "getentropy");
}

References uv__getentropy.

Referenced by uv__random_getentropy().

Variable Documentation

once

uv_once_t once = UV_ONCE_INIT

static

Definition at line 31 of file random-getentropy.c.

Referenced by uv__random_getentropy().

uv__getentropy

uv__getentropy_cb uv__getentropy

static

Definition at line 30 of file random-getentropy.c.

Referenced by uv__random_getentropy(), and uv__random_getentropy_init().