25 lines
527 B
C
25 lines
527 B
C
#include <sys/eventfd.h>
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#include <unistd.h>
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/* We duplicate the GLibc error semantics, which are poorly defined
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* if the read() or write() does not return the proper number of bytes.
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*/
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int eventfd_read(int fd, eventfd_t *counter)
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{
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int ret = read(fd, counter, sizeof(*counter));
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if (ret == sizeof(*counter))
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return 0;
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return -1;
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}
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int eventfd_write(int fd, eventfd_t counter)
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{
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int ret = write(fd, &counter, sizeof(counter));
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if (ret == sizeof(counter))
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return 0;
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return -1;
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}
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