Round Robin Scheduling via UCONTEXT.H Post: 302731831

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LEARN ABOUT CENTOS

swapcontext

SWAPCONTEXT(2)						   Linux 2.6 Programmer's Guide 					    SWAPCONTEXT(2)

NAME

       swapcontext - Swap out old context with new context

SYNOPSIS

       int sys_swapcontext (struct ucontext *old_ctx, struct ucontext *new_ctx, int r5, int r6, int r7, int r8, struct pt_regs *regs);

DESCRIPTION

       swapcontext  swaps out context old_ctx with new context new_ctx. The int r# values have no place in the system call functionality. The regs
       value indicates the current user register values from the user stack.

RETURN VALUE

       swapcontext returns 0 on success; otherwise, swapcontext returns one of the errors listed in the "Errors" section.

ERRORS

       -EFAULT
	      swapcontext could not verify that the memory area pointed to by old_ctx or new_ctx was accessible for the operation.

       -SIGSEGV
	      A fault occurred when the context was being copied into the kernel's image of the user's registers. The should only occur in an out-
	      of-memory situation.

SEE ALSO

       getcontext(2), sigaction(2), sigaltstack(2), sigprocmask(2)

AUTHOR

       Niki Rahimi

Linux 2.6							   2004-March-12						    SWAPCONTEXT(2)

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