refactor!: avoid hard dep to tokio rt

bindings/c/Cargo.toml

@@ -32,10 +32,10 @@ crate-type = ["cdylib", "staticlib"]
 doc = false
 
 [build-dependencies]
-cbindgen = "0.25.0"
+cbindgen = "0.26.0"
 
 [dependencies]
 bytes = "1.4.0"
 once_cell = "1.17.1"
-opendal = { path = "../../core" }
+opendal = { path = "../../core", features = ["layers-blocking"] }
 tokio = { version = "1.27", features = ["fs", "macros", "rt-multi-thread"] }

bindings/c/include/opendal.h

@@ -95,7 +95,7 @@ typedef struct BlockingLister BlockingLister;
  *
  * Read more backend init examples in [`services`]
  *
- * ```
+ * ```rust
  * # use anyhow::Result;
  * use opendal::services::Fs;
  * use opendal::BlockingOperator;
@@ -121,7 +121,6 @@ typedef struct BlockingLister BlockingLister;
  * Some services like s3, gcs doesn't have native blocking supports, we can use [`layers::BlockingLayer`]
  * to wrap the async operator to make it blocking.
  *
- * ```rust
  * # use anyhow::Result;
  * use opendal::layers::BlockingLayer;
  * use opendal::services::S3;

bindings/java/Cargo.toml

@@ -32,7 +32,6 @@ crate-type = ["cdylib"]
 doc = false
 
 [features]
-# Enable all opendal default feature by default.
 default = [
   "services-azblob",
   "services-azdls",
@@ -153,7 +152,7 @@ anyhow = "1.0.71"
 jni = "0.21.1"
 num_cpus = "1.15.0"
 once_cell = "1.19.0"
-opendal = { workspace = true }
+opendal = { workspace = true, features = ["layers-blocking"] }
 tokio = { version = "1.28.1", features = ["full"] }
 
 # This is not optimal. See also the Cargo issue:

bindings/nodejs/Cargo.toml

@@ -28,7 +28,6 @@ rust-version.workspace = true
 version.workspace = true
 
 [features]
-# Enable all opendal default feature by default.
 default = [
   "services-azblob",
   "services-azdls",
@@ -154,7 +153,7 @@ napi = { version = "2.11.3", default-features = false, features = [
   "async",
 ] }
 napi-derive = "2.14.6"
-opendal.workspace = true
+opendal = { workspace = true, features = ["layers-blocking"] }
 tokio = "1"
 
 [build-dependencies]