Remove once_cell dependency

libosdp/Cargo.toml

@@ -17,7 +17,6 @@ bitflags = "2.4.0"
 embedded-io = { version = "0.6.1", features = ["alloc"] }
 libosdp-sys = { path = "../libosdp-sys", default-features = false }
 log = "0.4.20"
-once_cell = { version = "1.18.0", optional = true, default-features = false, features = ["alloc", "critical-section"] }
 serde = { version = "1.0.192", features = ["derive", "alloc"], default-features = false }
 thiserror = { version = "1.0.50", optional = true }
 
@@ -30,8 +29,7 @@ sha256 = "1.5.0"
 
 [features]
 default = ["std"]
-arc = ["once_cell"]
-std = ["libosdp-sys/std", "thiserror", "serde/std", "once_cell/std", "arc"]
+std = ["libosdp-sys/std", "thiserror", "serde/std"]
 
 [[example]]
 name = "cp"

libosdp/src/lib.rs

@@ -82,14 +82,10 @@ pub use pdcap::*;
 pub use pdid::*;
 pub use pdinfo::*;
 
-#[cfg(feature = "arc")]
-use alloc::sync::Arc;
 #[allow(unused_imports)]
 use alloc::{
     borrow::ToOwned, boxed::Box, ffi::CString, format, str::FromStr, string::String, vec, vec::Vec,
 };
-#[cfg(feature = "arc")]
-use once_cell::sync::Lazy;
 #[cfg(feature = "std")]
 use thiserror::Error;
 
@@ -218,26 +214,16 @@ fn cstr_to_string(s: *const ::core::ffi::c_char) -> String {
     s.to_str().unwrap().to_owned()
 }
 
-#[cfg(feature = "arc")]
-static VERSION: Lazy<Arc<String>> = Lazy::new(|| {
-    let s = unsafe { libosdp_sys::osdp_get_version() };
-    Arc::new(cstr_to_string(s))
-});
-
-#[cfg(feature = "arc")]
-static SOURCE_INFO: Lazy<Arc<String>> = Lazy::new(|| {
-    let s = unsafe { libosdp_sys::osdp_get_source_info() };
-    Arc::new(cstr_to_string(s))
-});
-
 /// Get LibOSDP version
-#[cfg(feature = "arc")]
-pub fn get_version() -> String {
-    VERSION.as_ref().clone()
+pub fn get_version() -> &'static str {
+    let s = unsafe { libosdp_sys::osdp_get_version() };
+    let s = unsafe { core::ffi::CStr::from_ptr(s) };
+    s.to_str().unwrap()
 }
 
 /// Get LibOSDP source info string
-#[cfg(feature = "arc")]
-pub fn get_source_info() -> String {
-    SOURCE_INFO.as_ref().clone()
+pub fn get_source_info() -> &'static str {
+    let s = unsafe { libosdp_sys::osdp_get_source_info() };
+    let s = unsafe { core::ffi::CStr::from_ptr(s) };
+    s.to_str().unwrap()
 }