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build: Use compile_time_request system for init, tasks, and shutdown
Avoid using linker magic to define the init, task, and shutdown functions. Instead, use the compile_time_request system. This simplifies the build and produces more efficient code. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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ca9756413f
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26 changed files with 82 additions and 127 deletions
20
src/sched.h
20
src/sched.h
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@ -2,14 +2,14 @@
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#define __SCHED_H
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#include <stdint.h> // uint32_t
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#include "compiler.h" // __section
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#include "ctr.h" // DECL_CTR
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// Declare an init function (called at firmware startup)
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#define DECL_INIT(FUNC) _DECL_CALLBACK(initfuncs, FUNC)
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#define DECL_INIT(FUNC) _DECL_CALLLIST(ctr_run_initfuncs, FUNC)
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// Declare a task function (called periodically during normal runtime)
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#define DECL_TASK(FUNC) _DECL_CALLBACK(taskfuncs, FUNC)
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#define DECL_TASK(FUNC) _DECL_CALLLIST(ctr_run_taskfuncs, FUNC)
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// Declare a shutdown function (called on an emergency stop)
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#define DECL_SHUTDOWN(FUNC) _DECL_CALLBACK(shutdownfuncs, FUNC)
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#define DECL_SHUTDOWN(FUNC) _DECL_CALLLIST(ctr_run_shutdownfuncs, FUNC)
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// Timer structure for scheduling timed events (see sched_add_timer() )
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struct timer {
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@ -33,15 +33,7 @@ void sched_report_shutdown(void);
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void sched_main(void);
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// Compiler glue for DECL_X macros above.
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struct callback_handler {
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void (*func)(void);
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};
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#define _DECL_CALLBACK(NAME, FUNC) \
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const struct callback_handler _DECL_ ## NAME ## _ ## FUNC __visible \
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__section(".rodata." __stringify(NAME) ) = { .func = FUNC }
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#define foreachdecl(ITER, NAME) \
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extern typeof(*ITER) NAME ## _start[], NAME ## _end[]; \
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for (ITER = NAME ## _start ; ITER < NAME ## _end ; ITER ++)
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#define _DECL_CALLLIST(NAME, FUNC) \
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DECL_CTR("_DECL_CALLLIST " __stringify(NAME) " " __stringify(FUNC))
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#endif // sched.h
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