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+#ifndef _ASSERT_H
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+#define _ASSERT_H
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+
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+/** @file
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+ *
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+ * Assertions
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+ *
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+ * This file provides two assertion macros: assert() (for run-time
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+ * assertions) and linker_assert() (for link-time assertions).
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+ *
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+ */
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+
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+/**
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+ * Assert a condition at run-time.
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+ *
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+ * If the condition is not true, a debug message will be printed.
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+ * Assertions only take effect in debug-enabled builds (see DBG()).
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+ *
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+ * @todo Make an assertion failure abort the program
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+ *
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+ */
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+#define assert( condition ) \
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+ do { \
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+ if ( ! (condition) ) { \
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+ printf ( "assert(%s) failed at %s line %d [%s]\n", \
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+ #condition, __FILE__, __LINE__, \
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+ __FUNCTION__ ); \
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+ } \
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+ } while ( 0 )
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+
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+/**
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+ * Assert a condition at link-time.
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+ *
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+ * If the condition is not true, the link will fail with an unresolved
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+ * symbol (error_symbol).
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+ *
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+ * This macro is gPXE-specific. Do not use this macro in code
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+ * intended to be portable.
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+ *
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+ */
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+#define linker_assert( condition, error_symbol ) \
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+ if ( ! (condition) ) { \
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+ extern void error_symbol ( void ); \
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+ error_symbol(); \
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+ }
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+
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+#ifdef NDEBUG
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+#undef assert
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+#define assert(x) do {} while ( 0 )
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+
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+#endif /* _ASSERT_H */
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