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UL ref sequences: prevent double-initialization

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The existing code prevents double initialization if e.g., both gNB&UE
call these functions (like in a simulator). However, in the case of a
double-initialization such as stopping and re-starting the L1, the
memory will be freed, but not freed again. Basically, this works:

    generate()
    generate() # not initialized again

but this leads to problems:

    generate()
    free()
    generate() # not initialized again, but should be!

Reimplement the check based on the data to be initialized, such that an
intermediate free() will be handled properly.
This commit is contained in:
Robert Schmidt
2024-12-16 16:18:10 +01:00
parent 70b4611001
commit 5600316d34
1 changed files with 2 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_REFSIG/ul_ref_seq_nr.c
+2 -4
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@@ -177,10 +177,9 @@ c16_t *gNB_dmrs_lowpaprtype1_sequence[U_GROUP_NUMBER][V_BASE_SEQUENCE_NUMBER][MA
void generate_lowpapr_typ1_refsig_sequences(unsigned int scaling)
{
/* prevent multiple calls, relevant when both UE & gNB initialize this */
static bool already_called = false;
bool already_called = gNB_dmrs_lowpaprtype1_sequence[0][0][0] != NULL;
if (already_called)
return;
already_called = true;
unsigned int v = 0; // sequence hopping and group hopping are not supported yet
for (unsigned int Msc_RS = 0; Msc_RS <= INDEX_SB_LESS_32; Msc_RS++) {
@@ -200,9 +199,8 @@ c16_t *dmrs_lowpaprtype1_ul_ref_sig[U_GROUP_NUMBER][V_BASE_SEQUENCE_NUMBER][MAX_
void generate_ul_reference_signal_sequences(unsigned int scaling)
{
/* prevent multiple calls, relevant when both UE & gNB initialize this */
static bool already_called = false;
bool already_called = rv_ul_ref_sig[0][0][0] != NULL;
if (already_called) return;
already_called = true;
unsigned int u,v,Msc_RS;