nim-ffi/examples/timer/cpp_bindings/my_timer.h

// Generated by nim-ffi C codegen. Do not edit by hand.
//
// Native (zero-serialization) C ABI. Each call delivers its result to the
// callback. On RET_OK:
//   - string-returning procs: (msg, len) is the raw string bytes (not
//     NUL-terminated; use len).
//   - struct-returning procs: msg is a pointer to the returned C struct — cast
//     it to `const <Type>*` (len is sizeof). It is valid ONLY for the duration
//     of the callback; copy out anything you need before returning. The library
//     deep-frees it right after the callback (you free nothing).
// On RET_ERR, (msg, len) is the raw error text. A `<name>_cbor` variant of each
// proc also exists for generic/cross-language callers that prefer CBOR.
#ifndef NIM_FFI_GEN_MY_TIMER_H
#define NIM_FFI_GEN_MY_TIMER_H

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef NIM_FFI_RET_CODES
#define NIM_FFI_RET_CODES
#define RET_OK 0
#define RET_ERR 1
#define RET_MISSING_CALLBACK 2
#endif

#ifndef NIM_FFI_CALLBACK_T
#define NIM_FFI_CALLBACK_T
typedef void (*FFICallBack)(int callerRet, const char *msg, size_t len, void *userData);
#endif


// --- {.ffi.}-annotated types, exposed as C structs ----------
typedef struct {
  const char* name;
} TimerConfig;

typedef struct {
  const char* message;
  int64_t delayMs;
} EchoRequest;

typedef struct {
  const char* echoed;
  const char* timerName;
} EchoResponse;

typedef struct {
  EchoRequest *messages;
  size_t messages_len;
  const char* *tags;
  size_t tags_len;
  int note_present;
  const char* note;
  int retries_present;
  int64_t retries;
} ComplexRequest;

typedef struct {
  const char* summary;
  int64_t itemCount;
  int hasNote;
} ComplexResponse;

typedef struct {
  const char* message;
  int64_t echoCount;
} EchoEvent;

typedef struct {
  const char* name;
  const char* *payload;
  size_t payload_len;
  int64_t priority;
} JobSpec;

typedef struct {
  int64_t maxAttempts;
  int64_t backoffMs;
  const char* *retryOn;
  size_t retryOn_len;
} RetryPolicy;

typedef struct {
  int64_t startAtMs;
  int64_t intervalMs;
  int jitter_present;
  int64_t jitter;
} ScheduleConfig;

typedef struct {
  const char* jobId;
  int64_t willRunCount;
  int64_t firstRunAtMs;
  int64_t effectiveBackoffMs;
} ScheduleResult;


void *my_timer_create(TimerConfig config, FFICallBack callback, void *userData);

int my_timer_echo(void *ctx, FFICallBack callback, void *userData, EchoRequest req);

int my_timer_version(void *ctx, FFICallBack callback, void *userData);

int my_timer_complex(void *ctx, FFICallBack callback, void *userData, ComplexRequest req);

int my_timer_schedule(void *ctx, FFICallBack callback, void *userData, JobSpec job, RetryPolicy retry, ScheduleConfig schedule);

int my_timer_destroy(void *ctx);

// Native event payloads — cast the callback's msg accordingly:
//   "on_echo_fired"  ->  const EchoEvent *
uint64_t my_timer_add_event_listener(void *ctx, const char *eventName, FFICallBack callback, void *userData);
int my_timer_remove_event_listener(void *ctx, uint64_t listenerId);

#ifdef __cplusplus
} // extern "C"
#endif

#endif /* NIM_FFI_GEN_MY_TIMER_H */