364 lines
11 KiB
C
364 lines
11 KiB
C
#define EFL_BETA_API_SUPPORT 1
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#include <Efl_Core.h>
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#include <stdlib.h>
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#include <errno.h>
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typedef struct _Ctx {
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Eina_Promise *p;
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Eina_Bool should_fail;
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Eina_Future *timer;
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Eina_Value *value;
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} Ctx;
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typedef struct _Inner_Promise_Ctx {
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Eina_Future *future;
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Eina_Promise *promise;
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} Inner_Promise_Ctx;
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#define DEFAULT_MSG "the simple example is working!"
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#define VALUE_TYPE_CHECK(_v, _type) \
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if (_v.type != _type) \
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{ \
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fprintf(stderr, "Value type is not '%s' - received '%s'\n", \
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_type->name, _v.type->name); \
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return _v; \
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}
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static Eina_Value
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_timeout(void *data, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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Ctx *ctx = data;
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if (v.type == EINA_VALUE_TYPE_ERROR) goto end;
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if (ctx->should_fail) eina_promise_reject(ctx->p, ENETDOWN);
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else
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{
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Eina_Value tmp;
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eina_value_copy(ctx->value, &tmp);
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eina_promise_resolve(ctx->p, tmp);
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}
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end:
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if (ctx->value) eina_value_free(ctx->value);
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ctx->timer = NULL;
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free(ctx);
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return v;
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}
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static Eina_Value
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_promise_cancel(Eo *o EINA_UNUSED, void *data, Eina_Error error)
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{
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Ctx *ctx = data;
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if (error == ECANCELED && ctx->timer) eina_future_cancel(ctx->timer);
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return eina_value_error_init(error);
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}
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static Ctx *
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_promise_ctx_new(Efl_Loop *loop, Eina_Value *v)
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{
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Ctx *ctx;
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ctx = calloc(1, sizeof(Ctx));
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EINA_SAFETY_ON_NULL_GOTO(ctx, err_ctx);
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ctx->p = efl_loop_promise_new(loop);
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EINA_SAFETY_ON_NULL_GOTO(ctx->p, err_timer);
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ctx->value = v;
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return ctx;
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err_timer:
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free(ctx);
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err_ctx:
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eina_value_free(v);
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return NULL;
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}
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static Eina_Future *
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_future_get(Ctx *ctx, Efl_Loop *loop)
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{
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Eina_Future *f;
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f = eina_future_new(ctx->p);
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EINA_SAFETY_ON_NULL_GOTO(f, err_future);
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ctx->timer = eina_future_then(efl_loop_timeout(loop, 0.1), _timeout, ctx);
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EINA_SAFETY_ON_NULL_GOTO(ctx->timer, err_timer);
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return efl_future_then(loop, f, .error = _promise_cancel, .data = ctx);
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err_timer:
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eina_future_cancel(f);
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err_future:
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return NULL;
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}
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static Eina_Future *
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_fail_future_get(Efl_Loop *loop)
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{
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Ctx *ctx = _promise_ctx_new(loop, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(ctx, NULL);
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ctx->should_fail = EINA_TRUE;
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return _future_get(ctx, loop);
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}
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static Eina_Future *
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_str_future_get(Efl_Loop *loop)
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{
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Eina_Value *v = eina_value_util_string_new(DEFAULT_MSG);
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EINA_SAFETY_ON_NULL_RETURN_VAL(v, NULL);
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Ctx *ctx = _promise_ctx_new(loop, v);
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EINA_SAFETY_ON_NULL_RETURN_VAL(ctx, NULL);
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return _future_get(ctx, loop);
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}
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static Eina_Future *
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_int_future_get(Efl_Loop *loop, int i)
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{
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Eina_Value *v = eina_value_util_int_new(i);
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EINA_SAFETY_ON_NULL_RETURN_VAL(v, NULL);
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Ctx *ctx = _promise_ctx_new(loop, v);
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EINA_SAFETY_ON_NULL_RETURN_VAL(ctx, NULL);
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return _future_get(ctx, loop);
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}
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static Eina_Value
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_simple_ok(void *data EINA_UNUSED, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_STRING);
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return v;
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}
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static Eina_Value
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_alternate_error_cb(void *data, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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Eina_Bool *should_fail = data;
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Eina_Value new_v = EINA_VALUE_EMPTY;
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if (*should_fail)
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{
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*should_fail = EINA_FALSE;
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eina_value_setup(&new_v, EINA_VALUE_TYPE_ERROR);
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eina_value_set(&new_v, ENETDOWN);
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printf("Received succes from the previous future - Generating error for the next future...\n");
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}
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else
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{
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*should_fail = EINA_TRUE;
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Eina_Error err;
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_ERROR);
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eina_value_get(&v, &err);
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printf("Received error from the previous future - value: %s. Send success\n",
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eina_error_msg_get(err));
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}
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return new_v;
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}
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static void
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_alternate_error(Efl_Loop *loop)
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{
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static Eina_Bool should_fail = EINA_TRUE;
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eina_future_chain(_str_future_get(loop),
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{.cb = _alternate_error_cb, .data = &should_fail},
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{.cb = _alternate_error_cb, .data = &should_fail},
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{.cb = _alternate_error_cb, .data = &should_fail},
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{.cb = _alternate_error_cb, .data = &should_fail});
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}
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static Eina_Value
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_simple_err(void *data EINA_UNUSED, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_ERROR);
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return v;
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}
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static void
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_simple(Efl_Loop *loop)
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{
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eina_future_chain(_str_future_get(loop),
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eina_future_cb_console("Expecting the following message: "DEFAULT_MSG ". Got: ", NULL),
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{ .cb = _simple_ok, .data = NULL });
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eina_future_chain(_fail_future_get(loop),
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eina_future_cb_console("Expectig network down error. Got: ", NULL),
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{ .cb = _simple_err, .data = NULL });
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}
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static Eina_Value
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_chain_no_errors_cb(void *data EINA_UNUSED, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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int count;
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Eina_Value new_v;
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eina_value_setup(&new_v, EINA_VALUE_TYPE_INT);
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if (!v.type)
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count = 1;
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else
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_INT);
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eina_value_get(&v, &count);
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}
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eina_value_set(&new_v, count * 2);
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return new_v;
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}
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static void
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_chain_no_errors(Efl_Loop *loop)
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{
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eina_future_chain(_int_future_get(loop, 0),
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eina_future_cb_console("Expecting no value. Got: ", NULL),
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{.cb = _chain_no_errors_cb, .data = NULL},
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eina_future_cb_console("Expecting number 2. Got: ", NULL),
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{.cb = _chain_no_errors_cb, .data = NULL},
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eina_future_cb_console("Expecting number 4. Got: ", NULL),
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{.cb = _chain_no_errors_cb, .data = NULL},
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eina_future_cb_console("Expecting number 8. Got: ", NULL),
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{.cb = _chain_no_errors_cb, .data = NULL},
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eina_future_cb_console("Expecting number 16. Got: ", NULL));
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}
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static Eina_Value
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_chain_with_error_cb(void *data EINA_UNUSED, const Eina_Value v EINA_UNUSED, const Eina_Future *dead_future EINA_UNUSED)
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{
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Eina_Value err;
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eina_value_setup(&err, EINA_VALUE_TYPE_ERROR);
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eina_value_set(&err, E2BIG);
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return err;
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}
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static void
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_chain_with_error(Efl_Loop *loop)
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{
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eina_future_chain(_int_future_get(loop, 0),
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{ _chain_with_error_cb, NULL },
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eina_future_cb_console("Expecting argument list too long. Got: ", NULL),
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{ .cb = _simple_err, .data = NULL });
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}
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static Eina_Value
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_delayed_resolve(void *data, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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Inner_Promise_Ctx *ctx = data;
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Eina_Value new_v;
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eina_value_setup(&new_v, EINA_VALUE_TYPE_STRING);
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eina_value_set(&new_v, "Hello from inner future");
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eina_promise_resolve(ctx->promise, new_v);
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free(ctx);
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return v;
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}
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static Eina_Value
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_delayed_reject(void *data, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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Inner_Promise_Ctx *ctx = data;
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eina_promise_reject(ctx->promise, ENETDOWN);
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free(ctx);
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return v;
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}
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static void
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_inner_promise_cancel(void *data, const Eina_Promise *dead EINA_UNUSED)
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{
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Inner_Promise_Ctx *ctx = data;
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eina_future_cancel(ctx->future);
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free(ctx);
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}
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static Eina_Value
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_chain_inner_cb(void *data, const Eina_Value v, const Eina_Future *dead_future)
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{
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Inner_Promise_Ctx *ctx;
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Eina_Value r;
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int s = 0;
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eina_value_int_get(&v, &s);
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ctx = calloc(1, sizeof(Inner_Promise_Ctx));
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EINA_SAFETY_ON_NULL_GOTO(ctx, err);
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ctx->promise = eina_promise_continue_new(dead_future, _inner_promise_cancel, ctx);
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EINA_SAFETY_ON_NULL_GOTO(ctx->promise, err);
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printf("Creating a new promise inside the future cb\n");
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ctx->future = eina_future_then(_int_future_get(data, 0),
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!s ? _delayed_resolve : _delayed_reject,
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ctx);
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return eina_promise_as_value(ctx->promise);
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err:
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eina_value_setup(&r, EINA_VALUE_TYPE_ERROR);
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eina_value_set(&r, ENOMEM);
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free(ctx);
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return r;
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}
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static Eina_Value
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_chain_inner_last_cb(void *data EINA_UNUSED, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_STRING);
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return v;
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}
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static void
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_chain_inner_no_errors(Efl_Loop *loop)
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{
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eina_future_chain(_int_future_get(loop, 0),
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{ .cb = _chain_inner_cb, .data = loop },
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eina_future_cb_console("Expecting message: 'Hello from inner future'. Got: ", NULL),
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{ .cb = _chain_inner_last_cb, .data = NULL });
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}
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static Eina_Value
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_err_inner_chain(void *data, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_ERROR);
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efl_loop_quit(data, EINA_VALUE_EMPTY);
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return v;
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}
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static void
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_chain_inner_errors(Efl_Loop *loop)
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{
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eina_future_chain(_int_future_get(loop, 1),
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{ .cb = _chain_inner_cb, .data = loop },
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eina_future_cb_console("Expection network down error. Got: ", NULL),
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{ .cb = _err_inner_chain, .data = loop });
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}
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static Eina_Value
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_canceled_cb(void *data EINA_UNUSED, const Eina_Value v, const Eina_Future *dead_future EINA_UNUSED)
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{
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VALUE_TYPE_CHECK(v, EINA_VALUE_TYPE_ERROR);
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return v;
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}
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static void
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_future_cancel(Efl_Loop *loop)
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{
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Eina_Future *f;
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f = eina_future_chain(_int_future_get(loop, 0),
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL),
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{ .cb = _canceled_cb, .data = NULL },
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL),
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{ .cb = _canceled_cb, .data = NULL },
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL),
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{ .cb = _canceled_cb, .data = NULL },
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL),
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{ .cb = _canceled_cb, .data = NULL },
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL),
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{ .cb = _canceled_cb, .data = NULL },
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eina_future_cb_console("Expecting cancelled operation error. Got: ", NULL));
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eina_future_cancel(f);
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}
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EAPI_MAIN void
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efl_main(void *data EINA_UNUSED,
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const Efl_Event *ev)
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{
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_simple(ev->object);
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_alternate_error(ev->object);
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_chain_no_errors(ev->object);
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_chain_with_error(ev->object);
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_chain_inner_no_errors(ev->object);
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_chain_inner_errors(ev->object);
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_future_cancel(ev->object);
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}
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EFL_MAIN();
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