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87f134cfaa
Nuttx currently has 2 types of sleep interfaces: 1. Signal-scheduled sleep: nxsig_sleep() / nxsig_usleep() / nxsig_nanosleep() Weaknesses: a. Signal-dependent: The signal-scheduled sleep method is bound to the signal framework, while some driver sleep operations do not depend on signals. b. Timespec conversion: Signal-scheduled sleep involves timespec conversion, which has a significant impact on performance. 2. Busy sleep: up_mdelay() / up_udelay() Weaknesses: a. Does not actively trigger scheduling, occupy the CPU loading. 3. New interfaces: Scheduled sleep: nxsched_sleep() / nxsched_usleep() / nxsched_msleep() / nxsched_ticksleep() Strengths: a. Does not depend on the signal framework. b. Tick-based, without additional computational overhead. Currently, the Nuttx driver framework extensively uses nxsig_* interfaces. However, the driver does not need to rely on signals or timespec conversion. Therefore, a new set of APIs is added to reduce dependencies on other modules. (This PR also aims to make signals optional, further reducing the code size of Nuttx.) Signed-off-by: chao an <anchao.archer@bytedance.com> |
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| .. | ||
| CMakeLists.txt | ||
| Kconfig | ||
| Kconfig-16550 | ||
| Kconfig-cmsdk | ||
| Kconfig-lpuart | ||
| Kconfig-pci | ||
| Kconfig-pl011 | ||
| Kconfig-sci | ||
| Kconfig-uart | ||
| Kconfig-usart | ||
| Make.defs | ||
| ptmx.c | ||
| pty.c | ||
| pty.h | ||
| serial.c | ||
| serial_cmsdk.c | ||
| serial_dma.c | ||
| serial_gdbstub.c | ||
| serial_io.c | ||
| uart_16550.c | ||
| uart_bth4.c | ||
| uart_bth5.c | ||
| uart_hostfs.c | ||
| uart_pci_16550.c | ||
| uart_pl011.c | ||
| uart_ram.c | ||
| uart_rpmsg.c | ||