BLK_ON            106 srclib/apr/include/arch/netware/apr_arch_file_io.h enum {BLK_UNKNOWN, BLK_OFF, BLK_ON } blocking;
BLK_ON             48 srclib/apr/include/arch/os2/apr_arch_file_io.h enum { BLK_UNKNOWN, BLK_OFF, BLK_ON } blocking;
BLK_ON            102 srclib/apr/include/arch/unix/apr_arch_file_io.h enum {BLK_UNKNOWN, BLK_OFF, BLK_ON } blocking;