CONTEXT SWITCHING FOR PARTIAL AND START-OVER THREADS IN EMBEDDED REAL-TIME KERNEL

摘要

Methods and apparatus for implementing partial and start-over threads (T2/51, T1/57) in a kernel of an operating system are disclosed. In a computing system having at least one CPU (1), registers (52) for executing threads, and memory (3), a method for executing a partial thread includes executing a first thread (T2/51) in the registers (52), initiating an interrupt event that signals the activation of another thread (T1/57), saving a first portion of registers (52) to a memory location (4), wherein a second portion of the registers (52) is unsaved, the first portion including information associated with the first thread, executing in the registers (52), the another thread, and conducting further computing system operations. Additionally, conducting further computing system operations can include restoring the saved first portion of registers (52) from the memory location (4) to the registers (52) and resuming execution of the first thread. Also, another embodiment incorporates the foregoing method into a computer device.