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[firmware] WIP: make talloc irq-safe

This commit is contained in:
Harald Welte 2017-11-04 00:06:03 +01:00
parent eb50c9f914
commit 7b36306113
1 changed files with 10 additions and 0 deletions
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10
firmware/libcommon/source/pseudo_talloc.c
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@ -13,8 +13,11 @@ static uint8_t msgb_inuse[NUM_RCTX_SMALL];
void *_talloc_zero(const void *ctx, size_t size, const char *name)
{
unsigned int i;
unsigned long x;
local_irq_save(x);
if (size > RCTX_SIZE_SMALL) {
local_irq_restore(x);
TRACE_ERROR("%s() request too large(%d > %d)\r\n", __func__, size, RCTX_SIZE_SMALL);
return NULL;
}
@ -24,9 +27,11 @@ void *_talloc_zero(const void *ctx, size_t size, const char *name)
uint8_t *out = msgb_data[i];
msgb_inuse[i] = 1;
memset(out, 0, size);
local_irq_restore(x);
return out;
}
}
local_irq_restore(x);
TRACE_ERROR("%s() out of memory!\r\n", __func__);
return NULL;
}
@ -34,6 +39,9 @@ void *_talloc_zero(const void *ctx, size_t size, const char *name)
int _talloc_free(void *ptr, const char *location)
{
unsigned int i;
unsigned long x;
local_irq_save(x);
for (i = 0; i < ARRAY_SIZE(msgb_inuse); i++) {
if (ptr == msgb_data[i]) {
if (!msgb_inuse[i]) {
@ -41,10 +49,12 @@ int _talloc_free(void *ptr, const char *location)
} else {
msgb_inuse[i] = 0;
}
local_irq_restore(x);
return 0;
}
}
local_irq_restore(x);
TRACE_ERROR("%s: invalid pointer %p from %s\r\n", __func__, ptr, location);
return -1;
}