Kannel: Open Source WAP and SMS gateway  $Revision: 5037 $
thread.h
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56 
57 /*
58  * thread.h - thread manipulation
59  */
60 
61 #ifndef GW_THREAD_H
62 #define GW_THREAD_H
63 
64 #include "gw-config.h"
65 
66 #if !HAVE_PTHREAD_H
67 #error "You need POSIX.1 threads and <pthread.h> header file"
68 #endif
69 
70 #include <pthread.h>
71 
72 /*
73  * Wrapper around pthread_mutex_t to avoid problems with recursive calls
74  * to pthread_mutex_trylock on Linux (at least).
75  */
76 typedef struct {
77  pthread_mutex_t mutex;
78  long owner;
79  int dynamic;
80 #ifdef MUTEX_STATS
81  unsigned char *filename;
82  int lineno;
83  long locks;
84  long collisions;
85 #endif
86 } Mutex;
87 
88 
89 /*
90  * Create a Mutex.
91  */
92 #ifdef MUTEX_STATS
93 #define mutex_create() gw_claim_area(mutex_create_measured(mutex_create_real(), \
94  __FILE__, __LINE__))
95 #else
96 #define mutex_create() gw_claim_area(mutex_create_real())
97 #endif
98 
99 /*
100  * Create a Mutex. Call these functions via the macro defined above.
101  */
102 Mutex *mutex_create_measured(Mutex *mutex, char *filename, int lineno);
103 Mutex *mutex_create_real(void);
104 
105 
106 /*
107  * Initialize a statically allocated Mutex. We need those inside gwlib
108  * modules that are in turn used by the mutex wrapper, such as "gwmem" and
109  * "protected".
110  */
111 #ifdef MUTEX_STATS
112 #define mutex_init_static(mutex) \
113  mutex_create_measured(mutex_init_static_real(mutex), __FILE__, __LINE__)
114 #else
115 #define mutex_init_static(mutex) \
116  mutex_init_static_real(mutex)
117 #endif
118 
120 
121 
122 /*
123  * Destroy a Mutex.
124  */
125 void mutex_destroy(Mutex *mutex);
126 
127 
128 /* lock given mutex. PANIC if fails (non-initialized mutex or other
129  * coding error) */
130 #define mutex_lock(m) mutex_lock_real(m, __FILE__, __LINE__, __func__)
131 void mutex_lock_real(Mutex *mutex, char *file, int line, const char *func);
132 
133 
134 /* unlock given mutex, PANIC if fails (so do not call for non-locked) */
135 /* returns 0 if ok 1 if failure for debugging */
136 #define mutex_unlock(m) mutex_unlock_real(m, __FILE__, __LINE__, __func__)
137 int mutex_unlock_real(Mutex *mutex, char *file, int line, const char *func);
138 
139 
140 /*
141  * Try to lock given mutex, returns -1 if mutex is NULL; 0 if mutex acquired; otherwise
142  * EBUSY. PANIC if mutex was not properly initialized before.
143  */
144 #define mutex_trylock(m) mutex_trylock_real(m, __FILE__, __LINE__, __func__)
145 int mutex_trylock_real(Mutex *mutex, const char *file, int line, const char *func);
146 
147 #endif
148 
149 
int mutex_trylock_real(Mutex *mutex, const char *file, int line, const char *func)
Definition: thread.c:165
int dynamic
Definition: thread.h:79
FILE * file
Definition: log.c:133
static Mutex locks[NUM_LOCKS]
Definition: protected.c:88
void mutex_lock_real(Mutex *mutex, char *file, int line, const char *func)
Definition: thread.c:121
Mutex * mutex_init_static_real(Mutex *mutex)
Definition: thread.c:89
Mutex * mutex
Definition: fakewap.c:238
Mutex * mutex_create_real(void)
Definition: thread.c:78
pthread_mutex_t mutex
Definition: thread.h:77
char filename[FILENAME_MAX+1]
Definition: log.c:135
int mutex_unlock_real(Mutex *mutex, char *file, int line, const char *func)
Definition: thread.c:146
Definition: thread.h:76
void mutex_destroy(Mutex *mutex)
Definition: thread.c:97
long owner
Definition: thread.h:78
Mutex * mutex_create_measured(Mutex *mutex, char *filename, int lineno)
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