Drop perf counter dependencies for ohos target (#238)

Author: LuuuXXX

measureme/Cargo.toml

@@ -16,6 +16,6 @@ smallvec.workspace = true
 [features]
 nightly = []
 
-[target.'cfg(all(target_arch = "x86_64", target_os = "linux"))'.dependencies]
+[target.'cfg(all(target_arch = "x86_64", target_os = "linux", not(target_env = "ohos")))'.dependencies]
 memmap2.workspace = true
 perf-event-open-sys.workspace = true

measureme/src/counters.rs

@@ -303,7 +303,7 @@ const BUG_REPORT_MSG: &str =
     "please report this to https://github.com/rust-lang/measureme/issues/new";
 
 /// Linux x86_64 implementation based on `perf_event_open` and `rdpmc`.
-#[cfg(all(target_arch = "x86_64", target_os = "linux"))]
+#[cfg(all(target_arch = "x86_64", target_os = "linux", not(target_env = "ohos")))]
 mod hw {
     use memmap2::{Mmap, MmapOptions};
     use perf_event_open_sys::{bindings::*, perf_event_open};
@@ -935,7 +935,7 @@ mod hw {
     }
 }
 
-#[cfg(not(all(target_arch = "x86_64", target_os = "linux")))]
+#[cfg(not(all(target_arch = "x86_64", target_os = "linux", not(target_env = "ohos"))))]
 mod hw {
     use std::error::Error;
 
@@ -994,6 +994,10 @@ mod hw {
                 add_error("only supported OS is Linux");
             }
 
+            if cfg!(target_env = "ohos") {
+                add_error("unsupported OHOS environment");
+            }
+
             Err(msg.into())
         }
     }