Ruby
3.4.0dev (2024-11-23 revision b4d13fac3dd5420475aa1e14fdad8137da7e3ee0)
wasm
fiber.h
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#ifndef RB_WASM_SUPPORT_FIBER_H
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#define RB_WASM_SUPPORT_FIBER_H
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#include <
stdbool.h
>
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#ifndef WASM_FIBER_STACK_BUFFER_SIZE
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# define WASM_FIBER_STACK_BUFFER_SIZE 6144
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#endif
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struct
__rb_wasm_asyncify_fiber_ctx
{
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void
* top;
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void
* end;
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char
buffer[WASM_FIBER_STACK_BUFFER_SIZE];
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};
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// Fiber execution context needed to perform context switch
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typedef
struct
{
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// Fiber entry point called when the fiber started for the first time.
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// NULL if the entry point is main
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void (*entry_point)(
void
*,
void
*);
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// Opaque argument pointers passed to the entry point function
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void
*arg0, *arg1;
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// Internal asyncify buffer space
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struct
__rb_wasm_asyncify_fiber_ctx
asyncify_buf
;
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bool
is_rewinding;
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bool
is_started;
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}
rb_wasm_fiber_context
;
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// Initialize a given fiber context to be ready to pass to `rb_wasm_swapcontext`
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void
rb_wasm_init_context(
rb_wasm_fiber_context
*fcp,
void
(*func)(
void
*,
void
*),
void
*arg0,
void
*arg1);
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// Swap the execution control with `target_fiber` and save the current context in `old_fiber`
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// NOTE: `old_fiber` must be the current executing fiber context
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void
rb_wasm_swapcontext(
rb_wasm_fiber_context
*old_fiber,
rb_wasm_fiber_context
*target_fiber);
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// Returns the Asyncify buffer of next fiber if unwound for fiber context switch.
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// Used by the top level Asyncify handling in wasm/runtime.c
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void
*rb_wasm_handle_fiber_unwind(
void
(**new_fiber_entry)(
void
*,
void
*),
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void
**arg0,
void
**arg1,
bool
*is_new_fiber_started);
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#endif
stdbool.h
C99 shim for <stdbool.h>
__rb_wasm_asyncify_fiber_ctx
Definition:
fiber.h:10
asyncify_buf
Definition:
machine.c:9
rb_wasm_fiber_context
Definition:
fiber.h:17
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