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Languages & runtimes · #c
Learn how to implement dynamic memory allocation in C using malloc, calloc, and realloc to handle variable-sized data structures while avoiding memory leaks and segmentation faults.
A practical guide to using GCC's `__builtin_expect` to move cold error paths out of hot loops, with verification steps and honest trade-offs.
Learn how to use GCC's `__builtin_expect` to keep rare error-handling code out of the hot path, when it beats profile-guided optimization, and how to verify the generated assembly.
C11 <stdatomic.h> provides standard atomic types and operations for thread-safe shared data. Learn how to use atomic counters and publication flags, choose correct memory orders, and verify lock-free support.
C11's _Generic keyword lets you write a single macro that expands to the correct float, double or long double math function, eliminating duplicated code.
A systematic guide to diagnosing null-pointer segmentation faults in C: reading the fault address, using GDB backtraces, matching fixes to causes, and knowing when to escalate to Valgrind or ASan.
A technical guide to diagnosing SIGSEGV in C. Learn how to use GDB and Valgrind to identify NULL pointers, buffer overflows, and use-after-free errors.
C structs include invisible padding for alignment. Learn how alignas and offsetof let you measure and control layout to avoid memory waste and false sharing.
Use C99 designated initializers and compound literals to make struct setup safer and clearer. This post explains how they work, shows a practical example, discusses portability and lifetime pitfalls, and gives actionable take‑aways for everyday coding.
cpp