39 lines
906 B
C
39 lines
906 B
C
#include <mprintf.h>
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#include <printf.h>
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#include <process.h>
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#include <stdarg.h>
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#include <stdatomic.h>
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#include <streams.h>
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#include <string.h>
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#include <system.h>
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static char mprintf_buffer[MPRINTF_BUF_MAX];
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static atomic_flag mprintf_buffer_lock1 = ATOMIC_FLAG_INIT;
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static void mprintf_buffer_lock (void) {
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while (atomic_flag_test_and_set_explicit (&mprintf_buffer_lock1, memory_order_acquire)) {
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#if defined(__x86_64__)
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__asm__ volatile ("pause" ::: "memory");
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#endif
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}
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}
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static void mprintf_buffer_unlock (void) {
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atomic_flag_clear_explicit (&mprintf_buffer_lock1, memory_order_release);
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}
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void mprintf (const char* fmt, ...) {
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va_list args;
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va_start (args, fmt);
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mprintf_buffer_lock ();
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int len = vsnprintf (mprintf_buffer, MPRINTF_BUF_MAX, fmt, args);
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va_end (args);
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stream_write (process_get_pgid (), STREAM_OUT, mprintf_buffer, len);
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mprintf_buffer_unlock ();
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}
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