* Calculate the zone index for the allocation request size and set the * allocation request size to that particular zone's chunk size. */
| 409 | * allocation request size to that particular zone's chunk size. |
| 410 | */ |
| 411 | rt_inline int zoneindex(rt_size_t *bytes) |
| 412 | { |
| 413 | /* unsigned for shift opt */ |
| 414 | rt_uintptr_t n = (rt_uintptr_t)(*bytes); |
| 415 | |
| 416 | if (n < 128) |
| 417 | { |
| 418 | *bytes = n = (n + 7) & ~7; |
| 419 | |
| 420 | /* 8 byte chunks, 16 zones */ |
| 421 | return (n / 8 - 1); |
| 422 | } |
| 423 | if (n < 256) |
| 424 | { |
| 425 | *bytes = n = (n + 15) & ~15; |
| 426 | |
| 427 | return (n / 16 + 7); |
| 428 | } |
| 429 | if (n < 8192) |
| 430 | { |
| 431 | if (n < 512) |
| 432 | { |
| 433 | *bytes = n = (n + 31) & ~31; |
| 434 | |
| 435 | return (n / 32 + 15); |
| 436 | } |
| 437 | if (n < 1024) |
| 438 | { |
| 439 | *bytes = n = (n + 63) & ~63; |
| 440 | |
| 441 | return (n / 64 + 23); |
| 442 | } |
| 443 | if (n < 2048) |
| 444 | { |
| 445 | *bytes = n = (n + 127) & ~127; |
| 446 | |
| 447 | return (n / 128 + 31); |
| 448 | } |
| 449 | if (n < 4096) |
| 450 | { |
| 451 | *bytes = n = (n + 255) & ~255; |
| 452 | |
| 453 | return (n / 256 + 39); |
| 454 | } |
| 455 | *bytes = n = (n + 511) & ~511; |
| 456 | |
| 457 | return (n / 512 + 47); |
| 458 | } |
| 459 | if (n < 16384) |
| 460 | { |
| 461 | *bytes = n = (n + 1023) & ~1023; |
| 462 | |
| 463 | return (n / 1024 + 55); |
| 464 | } |
| 465 | |
| 466 | rt_kprintf("Unexpected byte count %d", n); |
| 467 | |
| 468 | return 0; |
no test coverage detected