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Add Key State Tracker

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This commit is contained in:
Florian Märkl 2020-07-12 19:28:36 +02:00
commit 736b4835df
5 changed files with 89 additions and 0 deletions
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7
lib/include/chiaki/gkcrypt.h
View file

@ -96,6 +96,13 @@ static inline void chiaki_gkcrypt_free(ChiakiGKCrypt *gkcrypt)
free(gkcrypt);
}
typedef struct chiaki_key_state_t {
uint64_t prev;
} ChiakiKeyState;
CHIAKI_EXPORT void chiaki_key_state_init(ChiakiKeyState *state);
CHIAKI_EXPORT uint64_t chiaki_key_state_request_pos(ChiakiKeyState *state, uint32_t low);
#ifdef __cplusplus
}
#endif

16
lib/src/gkcrypt.c
View file

@ -542,3 +542,19 @@ static void *gkcrypt_thread_func(void *user)
chiaki_mutex_unlock(&gkcrypt->key_buf_mutex);
return NULL;
}
CHIAKI_EXPORT void chiaki_key_state_init(ChiakiKeyState *state)
{
state->prev = 0;
}
CHIAKI_EXPORT uint64_t chiaki_key_state_request_pos(ChiakiKeyState *state, uint32_t low)
{
uint32_t prev_low = (uint32_t)state->prev;
uint32_t high = (uint32_t)(state->prev >> 32);
if(chiaki_seq_num_32_gt(low, prev_low) && low < prev_low)
high++;
else if(chiaki_seq_num_32_lt(low, prev_low) && low > prev_low && high)
high--;
return state->prev = (((uint64_t)high) << 32) | ((uint64_t)low);
}