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Merge pull request #2324 from LudwigOrtmann/native-random-warnings

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cpu/native: warn about uninitialized random module
This commit is contained in:
Ludwig Ortmann 2015-01-20 09:28:51 +01:00
commit e03596f9d6
1 changed files with 19 additions and 0 deletions
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19
cpu/native/periph/random.c
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@ -30,6 +30,7 @@
#include "debug.h" #include "debug.h"
static int powered = 0; static int powered = 0;
static int initialized = 0;
static int dev_random = -1; static int dev_random = -1;
/********************************************************************** /**********************************************************************
@ -63,12 +64,20 @@ void random_init(void)
_native_rng_mode); _native_rng_mode);
break; break;
} }
initialized = 1;
DEBUG("random_init: powering on\n"); DEBUG("random_init: powering on\n");
random_poweron(); random_poweron();
} }
int random_read(char *buf, unsigned int num) int random_read(char *buf, unsigned int num)
{ {
if (!initialized) {
warnx("random_read: random device not initialized, failing\n");
return 0;
}
if (!powered) { if (!powered) {
warnx("random_read: random device not powered, failing\n"); warnx("random_read: random device not powered, failing\n");
return 0; return 0;
@ -94,12 +103,22 @@ int random_read(char *buf, unsigned int num)
void random_poweron(void) void random_poweron(void)
{ {
DEBUG("random_poweron: power on\n"); DEBUG("random_poweron: power on\n");
if (!initialized) {
warnx("random_poweron: not initialized.");
}
powered = 1; powered = 1;
} }
void random_poweroff(void) void random_poweroff(void)
{ {
DEBUG("random_poweroff: power off\n"); DEBUG("random_poweroff: power off\n");
if (!initialized) {
warnx("random_poweroff: not initialized.");
}
powered = 0; powered = 0;
} }