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#ifndef UVLOOP_FORK_HANDLER_H_
#define UVLOOP_FORK_HANDLER_H_
volatile uint64_t MAIN_THREAD_ID = 0;
volatile int8_t MAIN_THREAD_ID_SET = 0;
typedef void (*OnForkHandler)(void);
OnForkHandler __forkHandler = NULL;
/* Auxiliary function to call global fork handler if defined.
Note: Fork handler needs to be in C (not cython) otherwise it would require
GIL to be present, but some forks can exec non-python processes.
void handleAtFork(void) {
    // Reset the MAIN_THREAD_ID on fork, because the main thread ID is not
    // always the same after fork, especially when forked from within a thread.
    MAIN_THREAD_ID_SET = 0;
    if (__forkHandler != NULL) {
        __forkHandler();
void setForkHandler(OnForkHandler handler)
    __forkHandler = handler;
void resetForkHandler(void)
    __forkHandler = NULL;
void setMainThreadID(uint64_t id) {
    MAIN_THREAD_ID = id;
    MAIN_THREAD_ID_SET = 1;

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