al - Audio Library Functions gDP - DP GBI Macros gdSP - General GBI Macros gSP - SP GBI Macros gt - Turbo Microcode RDP gu - Graphics Utilities Math - Math Functions nuSys - NuSystem os - N64 Operating System sp - Sprite Library Functions uh - Host to Target IO 64DD - N64 Disk Drive
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osSendMesgFormat#include <ultra64.h> s32 osSendMesg( OSMesgQueue *mq, OSMesg msg, s32 flag);What These Functions Do The osCreateMesgQueue, osSendMesg, osJamMesg, and osRecvMesg functions are messaging and synchronization facilities. Message queues provide a highly flexible communication and synchronization mechanism. The facilities are useful among threads, as well as between threads and events (primarily interrupts). See osSetEventMesg for a complete list of events. The osSendMesg call copies the message (msg) to the end of the given message queue (mq). The flag argument specifies the blocking mode of this send operation. If flag is set to OS_MESG_BLOCK, the routine blocks on a full message queue; that is, the invoking thread yields the CPU until there is an empty slot in the queue for writing. This thread is enqueued onto a priority-linked list associated with the message queue behind other threads of the same priority. The osSendMesg call always returns 0 for a blocking send call. Setting flag to OS_MESG_NO_BLOCK allows the osSendMesg call to return immediately with a return value of -1 when the message queue is full. If the osSendMesg message queue is not full, the message is delivered and the call returns with a return value of 0. The osSendMesg call will resume the highest priority thread blocked in the osRecvMesg message queue that is waiting for the queue to become "not empty," if indeed one is blocked. See Also osCreateMesgQueue osJamMesg osRecvMes osCreateThread osSetEventMesg
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