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Implement cooperative threads on hosted platforms using C code.

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This replaces SDL threads with real cooperative threads, which are less cpu intensive and allow priority scheduling.
The backend for context switching is dependant on the host (sigaltstack/longjmp on Unix, Fibers on Windows).
configure has options to force or disallow SDL threads.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29327 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2011-02-18 22:46:01 +00:00
parent 3926c30705
commit 6d85de3419
13 changed files with 580 additions and 27 deletions
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3
firmware/target/hosted/sdl/system-sdl.h
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@ -46,6 +46,9 @@ void sys_poweroff(void);
void sys_handle_argv(int argc, char *argv[]);
void gui_message_loop(void);
void sim_do_exit(void);
#ifndef HAVE_SDL_THREADS
void wait_for_interrupt(void);
#endif
extern bool background; /* True if the background image is enabled */
extern bool showremote;