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https://github.com/RGBCube/serenity
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Add SpinLock to IDE disk access.
This forces serialization of accesses. This driver needs to be redesigned.
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parent
dec5683e9c
commit
8f6998c902
7 changed files with 57 additions and 13 deletions
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@ -13,16 +13,19 @@ extern "C" {
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int fileno(FILE* stream)
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{
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assert(stream);
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return stream->fd;
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}
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int feof(FILE* stream)
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{
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assert(stream);
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return stream->eof;
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}
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char* fgets(char* buffer, int size, FILE* stream)
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{
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assert(stream);
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ssize_t nread = 0;
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for (;;) {
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if (nread >= size)
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@ -41,6 +44,7 @@ char* fgets(char* buffer, int size, FILE* stream)
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int fgetc(FILE* stream)
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{
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assert(stream);
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char ch;
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fread(&ch, sizeof(char), 1, stream);
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return ch;
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@ -58,6 +62,7 @@ int getchar()
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int fputc(int ch, FILE* stream)
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{
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assert(stream);
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write(stream->fd, &ch, 1);
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return (byte)ch;
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}
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@ -74,11 +79,13 @@ int putchar(int ch)
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void clearerr(FILE* stream)
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{
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assert(stream);
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stream->eof = false;
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}
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size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
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{
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assert(stream);
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ssize_t nread = read(stream->fd, ptr, nmemb * size);
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if (nread < 0)
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return 0;
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@ -89,6 +96,7 @@ size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
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size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream)
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{
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assert(stream);
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ssize_t nwritten = write(stream->fd, ptr, nmemb * size);
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if (nwritten < 0)
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return 0;
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@ -97,6 +105,7 @@ size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream)
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int fseek(FILE* stream, long offset, int whence)
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{
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assert(stream);
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off_t off = lseek(stream->fd, offset, whence);
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if (off < 0)
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return off;
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@ -105,6 +114,7 @@ int fseek(FILE* stream, long offset, int whence)
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long ftell(FILE* stream)
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{
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assert(stream);
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return lseek(stream->fd, 0, SEEK_CUR);
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}
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