mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 02:56:36 -04:00
Matthew Stanley
fe42da2744
Keeps both lines: master's PGXP session, draw-distance clamps, masked rejects and saturated-winding NCLIP; the release's render-pass kit additions, verified media/disc extents, timeline/present rings, cull-scale sites. Overlay ABI v30. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
/*
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* psx_fiber.h — cross-platform cooperative fibers for the BIOS thread
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* scheduler (traps.c) and exception-deferral (interrupts.c).
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*
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* The PS1 BIOS manages its own threads (TCBs) and switches between them
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* cooperatively; the runtime mirrors each BIOS thread with a host fiber so
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* the recompiled C for a suspended thread keeps its own native call stack
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* across a ChangeThread. The CD-boot handoff in particular depends on this:
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* a thread issues a CD command, WaitEvent-blocks, and the scheduler must be
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* able to resume a *different* thread's previously-suspended stack — which
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* requires real separate stacks, not nested dispatch.
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*
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* Backends:
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* - Windows: the Win32 Fiber API (ConvertThreadToFiber / CreateFiber /
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* SwitchToFiber / DeleteFiber). Behavior is identical to the original.
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* - POSIX (macOS/Linux): ucontext (makecontext / swapcontext).
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*
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* Cooperative, single-threaded: exactly one fiber runs at a time and all
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* switches are explicit. psx_fiber_current() is the GetCurrentFiber analog.
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*/
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#ifndef PSX_FIBER_H
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#define PSX_FIBER_H
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef void* psx_fiber_t;
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typedef void (*psx_fiber_entry)(void* arg);
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/* Make the current thread a fiber so it can switch to others. Idempotent;
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* returns the handle for the current thread's fiber. Call before the first
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* psx_fiber_switch on this thread. */
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psx_fiber_t psx_fiber_convert_thread(void);
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/* The currently-executing fiber (GetCurrentFiber analog). */
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psx_fiber_t psx_fiber_current(void);
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/* Create a fiber with its own stack. It does not run until switched to. */
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psx_fiber_t psx_fiber_create(size_t stack_size, psx_fiber_entry entry, void* arg);
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/* Switch execution to target; the caller is suspended until switched back. */
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void psx_fiber_switch(psx_fiber_t target);
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/* Destroy a fiber created by psx_fiber_create and free its stack. Must not
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* be the currently-running fiber. */
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void psx_fiber_destroy(psx_fiber_t fiber);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PSX_FIBER_H */
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