[176] | 1 | /* -*- C++ -*- */ |
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| 2 | |
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| 3 | #ifndef _SIZETHREADHEAP_H_ |
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| 4 | #define _SIZETHREADHEAP_H_ |
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| 5 | |
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| 6 | #include <assert.h> |
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| 7 | |
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| 8 | template <class Super> |
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| 9 | class SizeThreadHeap : public Super { |
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| 10 | public: |
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| 11 | |
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| 12 | inline void * malloc (size_t sz) { |
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| 13 | // Add room for a size field & a thread field. |
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| 14 | // Both of these must fit in a double. |
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| 15 | assert (sizeof(st) <= sizeof(double)); |
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| 16 | st * ptr = (st *) Super::malloc (sz + sizeof(double)); |
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| 17 | // Store the requested size. |
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| 18 | ptr->size = sz; |
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| 19 | assert (getOrigPtr(ptr + 1) == ptr); |
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| 20 | return (void *) (ptr + 1); |
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| 21 | } |
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| 22 | |
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| 23 | inline void free (void * ptr) { |
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| 24 | void * origPtr = (void *) getOrigPtr(ptr); |
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| 25 | Super::free (origPtr); |
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| 26 | } |
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| 27 | |
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| 28 | static inline volatile int getThreadId (void); |
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| 29 | |
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| 30 | static inline size_t& size (void * ptr) { |
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| 31 | return getOrigPtr(ptr)->size; |
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| 32 | } |
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| 33 | |
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| 34 | static inline int& thread (void * ptr) { |
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| 35 | return getOrigPtr(ptr)->tid; |
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| 36 | } |
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| 37 | |
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| 38 | private: |
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| 39 | |
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| 40 | typedef struct _st { |
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| 41 | size_t size; |
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| 42 | int tid; |
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| 43 | } st; |
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| 44 | |
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| 45 | static inline st * getOrigPtr (void * ptr) { |
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| 46 | return (st *) ((double *) ptr - 1); |
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| 47 | } |
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| 48 | |
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| 49 | }; |
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| 50 | |
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| 51 | |
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| 52 | |
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| 53 | // A platform-dependent way to get a thread id. |
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| 54 | |
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| 55 | // Include the necessary platform-dependent crud. |
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| 56 | #if defined(WIN32) || defined(__WIN32__) || defined(_WIN32) |
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| 57 | #ifndef WIN32 |
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| 58 | #define WIN32 1 |
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| 59 | #endif |
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| 60 | #include <windows.h> |
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| 61 | #include <process.h> |
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| 62 | #endif |
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| 63 | |
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| 64 | template <class SuperHeap> |
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| 65 | inline volatile int |
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| 66 | SizeThreadHeap<SuperHeap>::getThreadId (void) { |
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| 67 | #if defined(WIN32) |
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| 68 | return GetCurrentThreadId(); |
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| 69 | #endif |
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| 70 | #if defined(__BEOS__) |
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| 71 | return find_thread(0); |
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| 72 | #endif |
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| 73 | #if defined(__linux) |
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| 74 | // Consecutive thread id's in Linux are 1024 apart; |
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| 75 | // dividing off the 1024 gives us an appropriate thread id. |
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| 76 | return (int) pthread_self() >> 10; // (>> 10 = / 1024) |
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| 77 | #endif |
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| 78 | #if defined(__SVR4) |
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| 79 | return (int) lwp_self(); |
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| 80 | #endif |
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| 81 | #if defined(POSIX) // FIX ME?? |
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| 82 | return (int) pthread_self(); |
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| 83 | #endif |
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| 84 | #if USE_SPROC // FIX ME |
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| 85 | // This hairiness has the same effect as calling getpid(), |
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| 86 | // but it's MUCH faster since it avoids making a system call |
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| 87 | // and just accesses the sproc-local data directly. |
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| 88 | int pid = (int) PRDA->sys_prda.prda_sys.t_pid; |
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| 89 | return pid; |
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| 90 | #endif |
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| 91 | } |
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| 92 | |
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| 93 | |
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| 94 | |
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| 95 | #endif |
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