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| author | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
|---|---|---|
| committer | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
| commit | 67cdcc2e12118becb823e20a40cc2687f2b8425a (patch) | |
| tree | ed92c3234b89079e6d4cf36f5e80c5ffa79def48 /meap/meap-code/ch6/ch6-memscan-2 | |
| parent | e25482fca375d318a39c3b54db396b0db6e0b263 (diff) | |
| download | learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.tar.xz learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.zip | |
Started Rust in Action MEAP.
Diffstat (limited to 'meap/meap-code/ch6/ch6-memscan-2')
| -rw-r--r-- | meap/meap-code/ch6/ch6-memscan-2/Cargo.lock | 4 | ||||
| -rw-r--r-- | meap/meap-code/ch6/ch6-memscan-2/Cargo.toml | 6 | ||||
| -rw-r--r-- | meap/meap-code/ch6/ch6-memscan-2/src/main.rs | 14 |
3 files changed, 24 insertions, 0 deletions
diff --git a/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock b/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock new file mode 100644 index 0000000..8650077 --- /dev/null +++ b/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock @@ -0,0 +1,4 @@ +[[package]] +name = "ch6-memscan-2" +version = "0.1.0" + diff --git a/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml b/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml new file mode 100644 index 0000000..02e76db --- /dev/null +++ b/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "ch6-memscan-2" +version = "0.1.0" +authors = ["Tim McNamara <code@timmcnamara.co.nz>"] + +[dependencies] diff --git a/meap/meap-code/ch6/ch6-memscan-2/src/main.rs b/meap/meap-code/ch6/ch6-memscan-2/src/main.rs new file mode 100644 index 0000000..3784436 --- /dev/null +++ b/meap/meap-code/ch6/ch6-memscan-2/src/main.rs @@ -0,0 +1,14 @@ +fn main() { + let mut n_nonzero = 0; + + for i in 1..10000 { // <1> + let ptr = i as *const u8; + let byte_at_addr = unsafe { *ptr }; + + if byte_at_addr != 0 { + n_nonzero += 1; + } + } + + println!("non-zero bytes in memory: {}", n_nonzero); +}
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