[libc] remove BlockStore from cpp namespace

[nickdesaulniers]

The cpp namespace should only be used to mirror APIs from C++'s std:: namespace
(at least until we share more code with libc++, see
https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701)

[llvmbot]

@llvm/pr-subscribers-libc

Author: Nick Desaulniers (nickdesaulniers)

Changes

The cpp namespace should only be used to mirror APIs from C++'s std:: namespace
(at least until we share more code with libc++, see
https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701)

---

Full diff: https://github.com/llvm/llvm-project/pull/85312.diff

2 Files Affected:

• (modified) libc/src/__support/blockstore.h (-2)
• (modified) libc/src/stdlib/atexit.cpp (+1-1)

diff --git a/libc/src/__support/blockstore.h b/libc/src/__support/blockstore.h
index dc5fdd1b92fc29..ac0eb22692b40c 100644
--- a/libc/src/__support/blockstore.h
+++ b/libc/src/__support/blockstore.h
@@ -16,7 +16,6 @@
 #include <stdint.h>
 
 namespace LIBC_NAMESPACE {
-namespace cpp {
 
 // The difference between BlockStore a traditional vector types is that,
 // when more capacity is desired, a new block is added instead of allocating
@@ -203,7 +202,6 @@ void BlockStore<T, BLOCK_SIZE, REVERSE_ORDER>::destroy(
 template <typename T, size_t BLOCK_SIZE>
 using ReverseOrderBlockStore = BlockStore<T, BLOCK_SIZE, true>;
 
-} // namespace cpp
 } // namespace LIBC_NAMESPACE
 
 #endif // LLVM_LIBC_SRC___SUPPORT_BLOCKSTORE_H
diff --git a/libc/src/stdlib/atexit.cpp b/libc/src/stdlib/atexit.cpp
index 1513b7969f0dbc..741ea4f25103ac 100644
--- a/libc/src/stdlib/atexit.cpp
+++ b/libc/src/stdlib/atexit.cpp
@@ -36,7 +36,7 @@ struct AtExitUnit {
 //        mutexes simply passthrough. We will need a lock free stack.
 using ExitCallbackList = FixedVector<AtExitUnit, 64>;
 #elif defined(LIBC_COPT_PUBLIC_PACKAGING)
-using ExitCallbackList = cpp::ReverseOrderBlockStore<AtExitUnit, 32>;
+using ExitCallbackList = ReverseOrderBlockStore<AtExitUnit, 32>;
 #else
 // BlockStore uses dynamic memory allocation. To avoid dynamic memory
 // allocation in tests, we use a fixed size callback list when built for

[lntue]

Look like you need to update some tests also.