mirror of
https://github.com/bsnes-emu/bsnes.git
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94b2538af5
byuu says: Basically just a project rename, with s/bsnes/higan and the new icon from lowkee added in. It won't compile on Windows because I forgot to update the resource.rc file, and a path transform command isn't working on Windows. It was really just meant as a starting point, so that v091 WIPs can flow starting from .00 with the new name (it overshadows bsnes v091, so publicly speaking this "shouldn't exist" and will probably be deleted from Google Code when v092 is ready.)
67 lines
1.7 KiB
C
Executable file
67 lines
1.7 KiB
C
Executable file
/*
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libco.ucontext (2008-01-28)
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author: Nach
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license: public domain
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*/
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/*
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* WARNING: the overhead of POSIX ucontext is very high,
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* assembly versions of libco or libco_sjlj should be much faster
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*
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* This library only exists for two reasons:
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* 1 - as an initial test for the viability of a ucontext implementation
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* 2 - to demonstrate the power and speed of libco over existing implementations,
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* such as pth (which defaults to wrapping ucontext on unix targets)
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*
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* Use this library only as a *last resort*
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*/
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#define LIBCO_C
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#include "libco.h"
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#include <stdlib.h>
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#include <ucontext.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static thread_local ucontext_t co_primary;
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static thread_local ucontext_t *co_running = 0;
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cothread_t co_active() {
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if(!co_running) co_running = &co_primary;
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return (cothread_t)co_running;
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}
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cothread_t co_create(unsigned int heapsize, void (*coentry)(void)) {
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if(!co_running) co_running = &co_primary;
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ucontext_t *thread = (ucontext_t*)malloc(sizeof(ucontext_t));
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if(thread) {
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if((!getcontext(thread) && !(thread->uc_stack.ss_sp = 0)) && (thread->uc_stack.ss_sp = malloc(heapsize))) {
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thread->uc_link = co_running;
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thread->uc_stack.ss_size = heapsize;
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makecontext(thread, coentry, 0);
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} else {
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co_delete((cothread_t)thread);
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thread = 0;
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}
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}
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return (cothread_t)thread;
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}
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void co_delete(cothread_t cothread) {
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if(cothread) {
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if(((ucontext_t*)cothread)->uc_stack.ss_sp) { free(((ucontext_t*)cothread)->uc_stack.ss_sp); }
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free(cothread);
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}
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}
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void co_switch(cothread_t cothread) {
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ucontext_t *old_thread = co_running;
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co_running = (ucontext_t*)cothread;
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swapcontext(old_thread, co_running);
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}
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#ifdef __cplusplus
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}
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#endif
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