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#ifndef RB_WASM_SUPPORT_FIBER_H
#define RB_WASM_SUPPORT_FIBER_H
#include <stdbool.h>
#ifndef WASM_FIBER_STACK_BUFFER_SIZE
# define WASM_FIBER_STACK_BUFFER_SIZE 6144
#endif
struct __rb_wasm_asyncify_fiber_ctx {
void* top;
void* end;
char buffer[WASM_FIBER_STACK_BUFFER_SIZE];
};
// Fiber execution context needed to perform context switch
typedef struct {
// Fiber entry point called when the fiber started for the first time.
// NULL if the entry point is main
void (*entry_point)(void *, void *);
// Opaque argument pointers passed to the entry point function
void *arg0, *arg1;
// Internal asyncify buffer space
struct __rb_wasm_asyncify_fiber_ctx asyncify_buf;
bool is_rewinding;
bool is_started;
} rb_wasm_fiber_context;
// Initialize a given fiber context to be ready to pass to `rb_wasm_swapcontext`
void rb_wasm_init_context(rb_wasm_fiber_context *fcp, void (*func)(void *, void *), void *arg0, void *arg1);
// Swap the execution control with `target_fiber` and save the current context in `old_fiber`
// NOTE: `old_fiber` must be the current executing fiber context
void rb_wasm_swapcontext(rb_wasm_fiber_context *old_fiber, rb_wasm_fiber_context *target_fiber);
// Returns the Asyncify buffer of next fiber if unwound for fiber context switch.
// Used by the top level Asyncify handling in wasm/runtime.c
void *rb_wasm_handle_fiber_unwind(void (**new_fiber_entry)(void *, void *),
void **arg0, void **arg1, bool *is_new_fiber_started);
#endif
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