| |
| # FIDL internal library zx |
| |
| The `zx` library is is defined by |
| [//zircon/vdso/zx_common.fidl](/zircon/vdso/zx_common.fidl). It is included by |
| GN build rules into invocations of `fidlc` when building fidl code and need not |
| be explicitly depended upon by every fidl library. If invoking `fidlc` directly, |
| `zx_common.fidl` would need to be included with a `--files` argument if |
| necessary. |
| |
| You can reference this library with the `using` statement: |
| |
| ```fidl |
| using zx; |
| ``` |
| |
| The types generally correspond to [Zircon System |
| Types](/docs/concepts/api/system.md#types). For example, |
| `zx.duration` corresponds to `zx_duration_t`. |
| |
| > The `CHANNEL_MAX_MSG_BYTES` and `CHANNEL_MAX_MSG_HANDLES` |
| > are bound at `fidlc` compile time (that is, when the **compiler** |
| > is compiled) and reflect the constants present at that time. |
