Function SPI_IsMemoryReserved

src/backend/executor/spi.c:3525–3529

* Is memory reserved stack empty? */

 * Is memory reserved stack empty?
 */
bool SPI_IsMemoryReserved(void)
{
	Assert(!IsResManagerMemoryPolicyNone());
	return (SPIMemReserved == 0);
}

/**
  * Are we in SPI context