void vxInitReference(vx_reference_t *ref, vx_context_t *context, vx_enum type)
{
if (ref)
{
ref->context = context;
ref->magic = VX_MAGIC;
ref->type = type;
ref->internal_count = 0;
ref->external_count = 0;
ref->write_count = 0;
ref->read_count = 0;
ref->extracted = vx_false_e;
vxCreateSem(&ref->lock, 1);
}
}
VX_API_ENTRY vx_context VX_API_CALL vxCreateContext()
#endif
{
vx_context context = NULL;
if (single_context == NULL)
{
vxCreateSem(&context_lock, 1);
vxCreateSem(&global_lock, 1);
}
vxSemWait(&context_lock);
if (single_context == NULL)
{
/* read the variables for debugging flags */
vx_set_debug_zone_from_env();
context = VX_CALLOC(vx_context_t); /* \todo get from allocator? */
if (context)
{
vx_uint32 p = 0u, p2 = 0u, t = 0u;
context->p_global_lock = &global_lock;
context->imm_border.mode = VX_BORDER_UNDEFINED;
context->imm_border_policy = VX_BORDER_POLICY_DEFAULT_TO_UNDEFINED;
context->next_dynamic_user_kernel_id = 0;
context->next_dynamic_user_library_id = 1;
vxInitReference(&context->base, NULL, VX_TYPE_CONTEXT, NULL);
#if !DISABLE_ICD_COMPATIBILITY
context->base.platform = platform;
#endif
vxIncrementReference(&context->base, VX_EXTERNAL);
context->workers = vxCreateThreadpool(VX_INT_HOST_CORES,
VX_INT_MAX_REF, /* very deep queues! */
sizeof(vx_work_t),
vxWorkerNode,
context);
vxCreateConstErrors(context);
#ifdef EXPERIMENTAL_USE_HEXAGON
remote_handle_open((const char *)OPENVX_HEXAGON_NAME, &tmp_ph);
#endif
/* load all targets */
for (t = 0u; t < dimof(targetModules); t++)
{
if (vxLoadTarget(context, targetModules[t]) == VX_SUCCESS)
{
context->num_targets++;
}
}
if (context->num_targets == 0)
{
VX_PRINT(VX_ZONE_ERROR, "No targets loaded!\n");
free(context);
vxSemPost(&context_lock);
return 0;
}
/* initialize all targets */
for (t = 0u; t < context->num_targets; t++)
{
if (context->targets[t].module.handle)
{
/* call the init function */
if (context->targets[t].funcs.init(&context->targets[t]) != VX_SUCCESS)
{
VX_PRINT(VX_ZONE_WARNING, "Target %s failed to initialize!\n", context->targets[t].name);
/* unload this module */
vxUnloadTarget(context, t, vx_true_e);
break;
}
else
{
context->targets[t].enabled = vx_true_e;
}
}
}
/* assign the targets by priority into the list */
p2 = 0u;
for (p = 0u; p < VX_TARGET_PRIORITY_MAX; p++)
{
for (t = 0u; t < context->num_targets; t++)
{
vx_target_t * target = &context->targets[t];
if (p == target->priority)
{
context->priority_targets[p2] = t;
p2++;
}
}
}
/* print out the priority list */
for (t = 0u; t < context->num_targets; t++)
{
vx_target_t *target = &context->targets[context->priority_targets[t]];
if (target->enabled == vx_true_e)
{
VX_PRINT(VX_ZONE_TARGET, "target[%u]: %s\n",
target->priority,
target->name);
}
}
// create the internal thread which processes graphs for asynchronous mode.
vxInitQueue(&context->proc.input);
vxInitQueue(&context->proc.output);
context->proc.running = vx_true_e;
context->proc.thread = vxCreateThread(vxWorkerGraph, &context->proc);
single_context = context;
context->imm_target_enum = VX_TARGET_ANY;
memset(context->imm_target_string, 0, sizeof(context->imm_target_string));
/* memory maps table lock */
vxCreateSem(&context->memory_maps_lock, 1);
}
}
else
{
context = single_context;
vxIncrementReference(&context->base, VX_EXTERNAL);
}
vxSemPost(&context_lock);
return (vx_context)context;
}
